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Posted

I've been struggling to learn to mod minecraft, but wasn't successful in finding useful resources to learn the stuff I need, which is to create structures and biomes. Every site/blog I find with tutorial is either too old or incomplete. Can someone help me with some useful resources for learning? I already know how to program I just wanted to find some places to really understand Minecraft code.

Posted

Like Ugdhar says, the best thing is to learn to figure it out yourself. This is because that is what modding is based on. Other modders that write tutorials didn't learn it magically, rather they used their Java knowledge and inspected the vanilla code and then came up with ideas. Of course if you do find a tutorial then it is lucky, but just don't count on it. Also, unfortunately Minecraft has changed a lot over just a few years, and Forge continues to be revised as well, so tutorial information becomes outdated very quickly (I know because I try to write a lot of tutorial information).

 

The other thing is that many modders post their code on places like github and allow public access to it. So you can simply take your favorite mods and check their code as well to get ideas.

 

I'm honestly not much of an expert on world gen but I have a bit of information here you might want to think about: http://jabelarminecraft.blogspot.com/p/minecraft-forge-1721710-biome-quick-tips.html

 

I should warn you though that from a code perspective, the world gen is some of the hardest to fully understand. There are a lot of classes and methods with similar names, and the random generation can make it hard to really picture the execution logic just by reading it. But it is obviously a fun thing to mod so worth learning.

 

Note that in the end world gen is really just about placing blocks. So as long as you hook into the world gen process with a chunk generator, whether you follow the standard way of creating terrain, features and structures or just do your own is up to you. 

  • Like 1

Check out my tutorials here: http://jabelarminecraft.blogspot.com/

Posted
18 hours ago, gabrieldi said:

useful resources for learning

Many mods have been put up at github. If you Google this forum for github references, you can follow the links to see examples of what other modders have done (some are better to emulate than others).

  • Like 1

The debugger is a powerful and necessary tool in any IDE, so learn how to use it. You'll be able to tell us more and get better help here if you investigate your runtime problems in the debugger before posting.

Posted

I can't remember how I first learned coding, it's been that long. Back then it was called programming, then it was called software engineering. Today I keep up with forums and tutorials because no one seems to like to create decent docs for their APIs these days. 

Posted (edited)

To code, to program, or to mod.  Yes, I make a distinction between simply coding (writing technically valid code in some language) and programming (developing software to solve an actual problem).

 

I learned the basics of Java from a teach yourself in 21 days book, about 15 years ago.  Then, after being poor and without a computer for many years I re-learned Java from the official tutorials that Oracle has (https://docs.oracle.com/javase/tutorial/), though those might go a bit fast for someone who has never written code before.  Before that I'd learned Atari Basic, Pascal, and beginning C++ (in that order).  I was self-taught in all but Pascal (which I had a class on in high school), starting with Basic when I was in elementary school.

 

Really learning to program was then a mater of practice -- the more you do it that better you get.  Once you know the basics of a language, the thing to do is just start trying to do things with it.  No matter what books you read or videos you watch you will never really know how to program unless you put time into programming -- like any skill it requires practice.

 

As for modding, I watched some old videos by SweGoesMincraft (or something like that) which were for 1.6.4, to get the basics -- how to get Forge to recognize it as a mod, how to have Forge initialize it, etc.  For there it was a mater looking through the code and figuring things out.  This is also a skill; at first it can be hard -- Minecraft is most often not organized in the way I'd find most obvious.  But a lot of it was trying things and see if they worked, looking at error reports to track down anything that actually crashed, struggling to figure what was going wrong if I didn't get the results I wanted.  I remember the first time I got something to generate in game -- a quartz pillar though the middle of each chunk -- it seemed so cool that I'd made the game do *something*.  I then went on to have it build scattered empty rooms, then rooms with content, then whole procedural dungeons (my real goal), and at each step I felt good that I'd made it work.  That is how you learn to mod.

Edited by JaredBGreat
  • Like 1

Developer of Doomlike Dungeons.

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sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)     at java.security.cert.CertPathBuilder.build(Unknown Source)     ... 33 more Considering library com.google.code.gson:gson:2.10.1   Downloading library from https://libraries.minecraft.net/com/google/code/gson/gson/2.10.1/gson-2.10.1.jar Failed to establish connection to https://libraries.minecraft.net/com/google/code/gson/gson/2.10.1/gson-2.10.1.jar  Host: libraries.minecraft.net [127.0.0.1] javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target     at sun.security.ssl.Alert.createSSLException(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.checkServerCerts(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.onConsumeCertificate(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.consume(Unknown Source)     at sun.security.ssl.SSLHandshake.consume(Unknown Source)     at sun.security.ssl.HandshakeContext.dispatch(Unknown Source)     at sun.security.ssl.HandshakeContext.dispatch(Unknown Source)     at sun.security.ssl.TransportContext.dispatch(Unknown Source)     at sun.security.ssl.SSLTransport.decode(Unknown Source)     at sun.security.ssl.SSLSocketImpl.decode(Unknown Source)     at sun.security.ssl.SSLSocketImpl.readHandshakeRecord(Unknown Source)     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)     at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)     at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)     at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)     at java.net.HttpURLConnection.getResponseCode(Unknown Source)     at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)     at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:240)     at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:174)     at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:164)     at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:149)     at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:73)     at net.minecraftforge.installer.actions.ServerInstall.run(ServerInstall.java:72)     at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:271) 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sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)     at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)     at java.security.cert.CertPathBuilder.build(Unknown Source)     ... 33 more Considering library com.google.errorprone:error_prone_annotations:2.1.3   Downloading library from https://maven.creeperhost.net/com/google/errorprone/error_prone_annotations/2.1.3/error_prone_annotations-2.1.3.jar     Download completed: Checksum validated. Considering library com.google.guava:guava:25.1-jre   Downloading library from https://maven.creeperhost.net/com/google/guava/guava/25.1-jre/guava-25.1-jre.jar     Download completed: Checksum validated. Considering library com.google.j2objc:j2objc-annotations:1.1   Downloading library from https://maven.creeperhost.net/com/google/j2objc/j2objc-annotations/1.1/j2objc-annotations-1.1.jar     Download completed: Checksum validated. Considering library com.nothome:javaxdelta:2.0.1   Downloading library from https://maven.creeperhost.net/com/nothome/javaxdelta/2.0.1/javaxdelta-2.0.1.jar     Download completed: Checksum validated. Considering library commons-io:commons-io:2.4   Downloading library from https://libraries.minecraft.net/commons-io/commons-io/2.4/commons-io-2.4.jar Failed to establish connection to https://libraries.minecraft.net/commons-io/commons-io/2.4/commons-io-2.4.jar  Host: libraries.minecraft.net [127.0.0.1] javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target     at sun.security.ssl.Alert.createSSLException(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.checkServerCerts(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.onConsumeCertificate(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.consume(Unknown Source)     at sun.security.ssl.SSLHandshake.consume(Unknown Source)     at sun.security.ssl.HandshakeContext.dispatch(Unknown Source)     at sun.security.ssl.HandshakeContext.dispatch(Unknown Source)     at sun.security.ssl.TransportContext.dispatch(Unknown Source)     at sun.security.ssl.SSLTransport.decode(Unknown Source)     at sun.security.ssl.SSLSocketImpl.decode(Unknown Source)     at sun.security.ssl.SSLSocketImpl.readHandshakeRecord(Unknown Source)     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)     at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)     at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)     at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)     at java.net.HttpURLConnection.getResponseCode(Unknown Source)     at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)     at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:240)     at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:174)     at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:164)     at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:149)     at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:73)     at net.minecraftforge.installer.actions.ServerInstall.run(ServerInstall.java:72)     at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:271)     at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:182)     at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:154) Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target     at sun.security.validator.PKIXValidator.doBuild(Unknown Source)     at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)     at sun.security.validator.Validator.validate(Unknown Source)     at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)     at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)     at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)     ... 27 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target     at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)     at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)     at java.security.cert.CertPathBuilder.build(Unknown Source)     ... 33 more Considering library de.oceanlabs.mcp:mcp_config:1.20.1-20230612.114412@zip   Downloading library from https://maven.creeperhost.net/de/oceanlabs/mcp/mcp_config/1.20.1-20230612.114412/mcp_config-1.20.1-20230612.114412.zip     Download completed: Checksum validated. Considering library de.siegmar:fastcsv:2.2.2   Downloading library from https://maven.creeperhost.net/de/siegmar/fastcsv/2.2.2/fastcsv-2.2.2.jar     Download completed: Checksum validated. Considering library net.minecraftforge:ForgeAutoRenamingTool:0.1.22:all   Downloading library from https://maven.creeperhost.net/net/minecraftforge/ForgeAutoRenamingTool/0.1.22/ForgeAutoRenamingTool-0.1.22-all.jar     Download completed: Checksum validated. Considering library net.minecraftforge:binarypatcher:1.1.1   Downloading library from https://maven.creeperhost.net/net/minecraftforge/binarypatcher/1.1.1/binarypatcher-1.1.1.jar     Download completed: Checksum validated. Considering library net.minecraftforge:fmlcore:1.20.1-47.3.12   Downloading library from https://maven.creeperhost.net/net/minecraftforge/fmlcore/1.20.1-47.3.12/fmlcore-1.20.1-47.3.12.jar     Download completed: Checksum validated. Considering library net.minecraftforge:fmlearlydisplay:1.20.1-47.3.12   File exists: Checksum validated. Considering library net.minecraftforge:fmlloader:1.20.1-47.3.12   File exists: Checksum validated. Considering library net.minecraftforge:forge:1.20.1-47.3.12:universal   Downloading library from https://maven.creeperhost.net/net/minecraftforge/forge/1.20.1-47.3.12/forge-1.20.1-47.3.12-universal.jar     Download completed: Checksum validated. Considering library net.minecraftforge:installertools:1.4.1   Downloading library from https://maven.creeperhost.net/net/minecraftforge/installertools/1.4.1/installertools-1.4.1.jar     Download completed: Checksum validated. Considering library net.minecraftforge:jarsplitter:1.1.4   Downloading library from https://maven.creeperhost.net/net/minecraftforge/jarsplitter/1.1.4/jarsplitter-1.1.4.jar     Download completed: Checksum validated. Considering library net.minecraftforge:javafmllanguage:1.20.1-47.3.12   Downloading library from https://maven.creeperhost.net/net/minecraftforge/javafmllanguage/1.20.1-47.3.12/javafmllanguage-1.20.1-47.3.12.jar     Download completed: Checksum validated. Considering library net.minecraftforge:lowcodelanguage:1.20.1-47.3.12   Downloading library from https://maven.creeperhost.net/net/minecraftforge/lowcodelanguage/1.20.1-47.3.12/lowcodelanguage-1.20.1-47.3.12.jar     Download completed: Checksum validated. Considering library net.minecraftforge:mclanguage:1.20.1-47.3.12   Downloading library from https://maven.creeperhost.net/net/minecraftforge/mclanguage/1.20.1-47.3.12/mclanguage-1.20.1-47.3.12.jar     Download completed: Checksum validated. Considering library net.minecraftforge:srgutils:0.4.3   Downloading library from https://maven.creeperhost.net/net/minecraftforge/srgutils/0.4.3/srgutils-0.4.3.jar     Download completed: Checksum validated. Considering library net.minecraftforge:srgutils:0.4.9   Downloading library from https://maven.creeperhost.net/net/minecraftforge/srgutils/0.4.9/srgutils-0.4.9.jar     Download completed: Checksum validated. Considering library net.minecraftforge:srgutils:0.5.6   Downloading library from https://maven.creeperhost.net/net/minecraftforge/srgutils/0.5.6/srgutils-0.5.6.jar     Download completed: Checksum validated. Considering library net.sf.jopt-simple:jopt-simple:5.0.4   Downloading library from https://libraries.minecraft.net/net/sf/jopt-simple/jopt-simple/5.0.4/jopt-simple-5.0.4.jar Failed to establish connection to https://libraries.minecraft.net/net/sf/jopt-simple/jopt-simple/5.0.4/jopt-simple-5.0.4.jar  Host: libraries.minecraft.net [127.0.0.1] javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target     at sun.security.ssl.Alert.createSSLException(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.TransportContext.fatal(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.checkServerCerts(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.onConsumeCertificate(Unknown Source)     at sun.security.ssl.CertificateMessage$T13CertificateConsumer.consume(Unknown Source)     at sun.security.ssl.SSLHandshake.consume(Unknown Source)     at sun.security.ssl.HandshakeContext.dispatch(Unknown Source)     at sun.security.ssl.HandshakeContext.dispatch(Unknown Source)     at sun.security.ssl.TransportContext.dispatch(Unknown Source)     at sun.security.ssl.SSLTransport.decode(Unknown Source)     at sun.security.ssl.SSLSocketImpl.decode(Unknown Source)     at sun.security.ssl.SSLSocketImpl.readHandshakeRecord(Unknown Source)     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)     at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)     at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)     at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)     at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)     at java.net.HttpURLConnection.getResponseCode(Unknown Source)     at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)     at net.minecraftforge.installer.DownloadUtils.getConnection(DownloadUtils.java:240)     at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:174)     at net.minecraftforge.installer.DownloadUtils.download(DownloadUtils.java:164)     at net.minecraftforge.installer.DownloadUtils.downloadLibrary(DownloadUtils.java:149)     at net.minecraftforge.installer.actions.Action.downloadLibraries(Action.java:73)     at net.minecraftforge.installer.actions.ServerInstall.run(ServerInstall.java:72)     at net.minecraftforge.installer.InstallerPanel.run(InstallerPanel.java:271)     at net.minecraftforge.installer.SimpleInstaller.launchGui(SimpleInstaller.java:182)     at net.minecraftforge.installer.SimpleInstaller.main(SimpleInstaller.java:154) Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target     at sun.security.validator.PKIXValidator.doBuild(Unknown Source)     at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)     at sun.security.validator.Validator.validate(Unknown Source)     at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)     at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)     at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)     ... 27 more Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target     at sun.security.provider.certpath.SunCertPathBuilder.build(Unknown Source)     at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)     at java.security.cert.CertPathBuilder.build(Unknown Source)     ... 33 more Considering library net.sf.jopt-simple:jopt-simple:6.0-alpha-3   Downloading library from https://maven.creeperhost.net/net/sf/jopt-simple/jopt-simple/6.0-alpha-3/jopt-simple-6.0-alpha-3.jar     Download completed: Checksum validated. Considering library org.checkerframework:checker-qual:2.0.0   Downloading library from https://maven.creeperhost.net/org/checkerframework/checker-qual/2.0.0/checker-qual-2.0.0.jar     Download completed: Checksum validated. Considering library org.codehaus.mojo:animal-sniffer-annotations:1.14   Downloading library from https://maven.creeperhost.net/org/codehaus/mojo/animal-sniffer-annotations/1.14/animal-sniffer-annotations-1.14.jar     Download completed: Checksum validated. Considering library org.ow2.asm:asm-analysis:9.2   Downloading library from https://maven.creeperhost.net/org/ow2/asm/asm-analysis/9.2/asm-analysis-9.2.jar     Download completed: Checksum validated. Considering library org.ow2.asm:asm-commons:9.2   Downloading library from https://maven.creeperhost.net/org/ow2/asm/asm-commons/9.2/asm-commons-9.2.jar     Download completed: Checksum validated. Considering library org.ow2.asm:asm-commons:9.6   Downloading library from https://maven.creeperhost.net/org/ow2/asm/asm-commons/9.6/asm-commons-9.6.jar     Download completed: Checksum validated. Considering library org.ow2.asm:asm-tree:9.2   Downloading library from https://maven.creeperhost.net/org/ow2/asm/asm-tree/9.2/asm-tree-9.2.jar     Download completed: Checksum validated. Considering library org.ow2.asm:asm-tree:9.6   Downloading library from https://maven.creeperhost.net/org/ow2/asm/asm-tree/9.6/asm-tree-9.6.jar     Download completed: Checksum validated. Considering library org.ow2.asm:asm:9.2   Downloading library from https://maven.creeperhost.net/org/ow2/asm/asm/9.2/asm-9.2.jar     Download completed: Checksum validated. Considering library org.ow2.asm:asm:9.6   Downloading library from https://maven.creeperhost.net/org/ow2/asm/asm/9.6/asm-9.6.jar     Download completed: Checksum validated. Considering library trove:trove:1.0.2   Downloading library from https://maven.creeperhost.net/trove/trove/1.0.2/trove-1.0.2.jar     Download completed: Checksum validated. These libraries failed to download. Try again. com.google.code.findbugs:jsr305:3.0.2 com.google.code.gson:gson:2.10.1 commons-io:commons-io:2.4 net.sf.jopt-simple:jopt-simple:5.0.4 There was an error during installation  
    • Maybe some kind of bug with Pixelmon - something with Raids   Report it to the Creators
    • Did you make changes at the paper-global.yml file?   If not, delete this file and restart the server
    • My friends and I are playing a modified version of BMC4 and we're noticing stuff like passive mobs. (I think) like creatures/animals from Alex mobs, naturalist, let's do nature and even vanilla MC (sheep, cow, pigs, chickens, horses, donkeys) don't really spawn in, unlike the sea creatures and hostile monsters spawn in just fine and normal numbers. Here is a mod list from a crash report: https://pastebin.ubuntu.com/p/K9vJxxx6n4/ Just a quick copy and paste of the mod list from an unrelated crash report If anything please let me know if I should post pics of the mods from my mods folder I want to know how to increase their spawn rate/amount and if there are any mods that are causing the scarce appearances of these mobs
    • I'm locally hosting a server and when Connecting to it Me (and my friends) get disconnected with the Warning:  [00:55:21] [Server thread/INFO] [minecraft/ServerGamePacketListenerImpl]: butterrocker lost connection: Disconnected [00:55:21] [Server thread/INFO] [minecraft/MinecraftServer]: butterrocker left the game [00:55:21] [Server thread/WARN] [minecraft/Connection]: handleDisconnection() called twice Server latest.log Client latest.log This server is hosted locally, Minecraft ver 1.20.1 and forge ver 47.3.22 I can connect the the sever just fine locally, but when connecting to the IP Others and I cannot connect, I've changed "-Dfml.readTimeout=240" from 30 to 240, to no affect.  I've removed the client side config files, to No avail, Checked mod vers by moving around the files, still nothing. I'm at a loss currently. Yesterday 1/13/25 everything worked fine and My friends and I could all connect, but now we cannot. Any assistance would be greatly appreciated.  If any further information is required please let me know, Thanks!
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