[RESOLVED] "Session ID is null" Error when Running Minecraft from Eclipse

[MarekVarro]

Hello world,

 

I've been following Pahimar's 5th "Let's Mod" video tutorial for the most part. However, I've been utilizing more up to date versions of MCP (mcp802) and Forge (minecraftforge-src-1.6.1-8.9.0.751). Regardless of the difference in versions, I was fairly successful with this endeavor and was able to generate a Minecraft project with no build errors as well as to initialize a mod project using the Minecraft project as a dependency.

 

It is at the point where I try to build either project (running Vanilla + Forge or the modded version within eclipse) where I encounter the following issue:

 

  Quote

2013-07-02 18:44:35 [CLIENT] [iNFO] Setting user: Player763

2013-07-02 18:44:35 [CLIENT] [iNFO] (Session ID is null)

java.lang.NullPointerException

at java.io.Reader.<init>(Unknown Source)

at java.io.InputStreamReader.<init>(Unknown Source)

at net.minecraft.src.AchievementMap.<init>(AchievementMap.java:20)

at net.minecraft.src.AchievementMap.<clinit>(AchievementMap.java:11)

at net.minecraft.src.StatBase.registerStat(StatBase.java:60)

at net.minecraft.src.StatBasic.registerStat(StatBasic.java:20)

at net.minecraft.src.StatList.<clinit>(StatList.java:22)

at net.minecraft.src.Minecraft.<init>(Minecraft.java:210)

at net.minecraft.client.main.Main.main(Main.java:76)

at Start.main(Start.java:11)

Exception in thread "main" java.lang.ExceptionInInitializerError

at net.minecraft.src.StatCollector.<clinit>(StatCollector.java:5)

at net.minecraft.src.Item.getStatName(Item.java:476)

at net.minecraft.src.StatList.initUsableStats(StatList.java:206)

at net.minecraft.src.StatList.initStats(StatList.java:118)

at net.minecraft.src.Item.<clinit>(Item.java:687)

at net.minecraft.src.Block.<clinit>(Block.java:1316)

at net.minecraft.src.StatList.initMinableStats(StatList.java:180)

at net.minecraft.src.StatList.<clinit>(StatList.java:87)

at net.minecraft.src.Minecraft.<init>(Minecraft.java:210)

at net.minecraft.client.main.Main.main(Main.java:76)

at Start.main(Start.java:11)

Caused by: java.lang.NullPointerException

at java.io.Reader.<init>(Unknown Source)

at java.io.InputStreamReader.<init>(Unknown Source)

at org.apache.commons.io.IOUtils.readLines(IOUtils.java:986)

at net.minecraft.src.StringTranslate.<init>(StringTranslate.java:29)

at net.minecraft.src.StringTranslate.<clinit>(StringTranslate.java:21)

... 11 more

I would have used the pastebin feature, but it seemed to be down when I tried generating this, appologies.

 

 

How can I either initialize the Session ID, or circumvent this issue?

 

Thanks in advance!

[culegooner]

Are you sure forge is being compiled in??? I don't think so.

 

Session ID is null has nothing to do with this error.

Go to Java Build Path -> Libraries

and click on "Add Jar"

select jars->version->1.6.1-> 1.6.1.jar

 

Then go the Order and Export tab and select 1.6.1.jar

 

Now it should run minecraft

 

[MarekVarro]

Thank you very kindly!

 

That reply set me on the right path, although I did run in to some other issues I was able to resolve.

 

For the sake of posterity, I'll elaborate a little.

 

You were indeed right that I needed to link in the 1.6.1.jar file. I was uncertain if that was the minecraft file I needed, simply because the name was not particularly clear (One might deduce it's nature, but it is just obscure enough to be uncertain).

Because I wasn't sure, I instead downloaded and linked the Minecraft.jar for version 1.6.1 separately.

 

Once I'd removed my original link, I linked the 1.6.1.jar file in the .../mcp/jars/versions/1.6.1 folder.

 

However, once the project rebuilt, 22 errors were generated. I took note of the errors that mentioned anything to do with imports and isolated the issue was that I had not yet linked in joptsimple.

 

Fixing this was as simple as linking in jopt-simple-4.5.jar from /mcp/jars/libraries/net/sf/jopt-simple/jopt-simple/4.5/

 

 

Again, thanks for the help. It does seem simple to me now, although I wouldn't likely have thought the jar I was using would function, but would not be correct (