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Installing Forge problems

Posted February 8, 20205 yr

Hey everyone,

I was looking to install the 1.15.2 Forge, I grabbed the forge-1.15.2-31.1.1-installer.jar from the files page.

After it was downloaded I double clicked it and nothing. It did appear to be loading for a moment and then just nothing showed up.

So I went looking around, some said to use the cmd window so I did

This is what I got

C:\Users\Sub\Downloads>java forge-1.15.2-31.1.1-installer.jar
Error: Could not find or load main class forge-1.15.2-31.1.1-installer.jar

C:\Users\Sub\Downloads>forge-1.15.2-31.1.1-installer.jar

C:\Users\Sub\Downloads>

I have checked and verified that I am on Java8, I am not sure what else to check. I have installed previous forge editions with no issues, but that was a while ago.

Thanks for any help in this matter!

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February 8, 20205 yr

Author

I went back and grabbed 1.15.2-31.1.0 from the files and guess what it works fine. Guess it is the 31.1.1 issue for me.

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By kandyxyz123 · Posted 4 hours ago4 hr
can't downloading net.minecraftforge:forge:1.20.1-47.4.11:userdev

Attempt to build the project depends on the error.

2025-11-26T01:09:09.781+0700 [INFO] [org.gradle.api.Project] Downloading net.minecraftforge:forge:1.20.1-47.4.11:userdev
2025-11-26T01:09:09.815+0700 [DEBUG] [sun.net.www.protocol.http.HttpURLConnection] sun.net.www.MessageHeader@c3e32126 pairs: {GET /net/minecraftforge/forge/1.20.1-47.4.11/forge-1.20.1-47.4.11-userdev.jar.md5 HTTP/1.1: null}{Accept-Encoding: identity, gzip, deflate}{User-Agent: Java/17.0.17}{Host: maven.minecraftforge.net}{Accept: text/html, image/gif, image/jpeg, /; q=0.2}{Connection: keep-alive}
2025-11-26T01:09:10.015+0700 [DEBUG] [sun.net.www.protocol.http.HttpURLConnection] sun.net.www.MessageHeader@1c8f63b418 pairs: {null: HTTP/1.1 200 OK}{Date: Tue, 25 Nov 2025 18:09:09 GMT}{Content-Type: application/octet-stream}{Content-Length: 32}{Connection: keep-alive}{Cache-Control: public, max-age=3600}{content-disposition: attachment; filename="forge-1.20.1-47.4.11-userdev.jar.md5"; filename*=utf-8''forge-1.20.1-47.4.11-userdev.jar.md5}{content-security-policy: sandbox}{last-modified: Fri, 21 Nov 2025 18:09:42 GMT}{cf-cache-status: DYNAMIC}{Nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}}{Speculation-Rules: "/cdn-cgi/speculation"}{Server-Timing: cfCacheStatus;desc="DYNAMIC"}{Server-Timing: cfEdge;dur=5,cfOrigin;dur=114}{Report-To: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=d4ppa9lGqwLVnahVj7ADGyM%2F5BdhfaGyJZTRkvAzUhyEC8X16eYTtFb0PvSqtHJe5vmkP3ivDyZrt0qjZDl%2BxGDOPpB3vQ98R3OqwkrTX0VbXrdfqhs%3D"}]}}{Server: cloudflare}{CF-RAY: 9a43186ffec25c24-TLL}{alt-svc: h3=":443"; ma=86400}
2025-11-26T01:09:10.053+0700 [DEBUG] [sun.net.www.protocol.http.HttpURLConnection] sun.net.www.MessageHeader@6eb15dc16 pairs: {GET /net/minecraftforge/forge/1.20.1-47.4.11/forge-1.20.1-47.4.11-userdev.jar HTTP/1.1: null}{Accept-Encoding: identity, gzip, deflate}{User-Agent: Java/17.0.17}{Host: maven.minecraftforge.net}{Accept: text/html, image/gif, image/jpeg, /; q=0.2}{Connection: keep-alive}
2025-11-26T01:09:10.141+0700 [DEBUG] [sun.net.www.protocol.http.HttpURLConnection] sun.net.www.MessageHeader@6e02b7821 pairs: {null: HTTP/1.1 200 OK}{Date: Tue, 25 Nov 2025 18:09:09 GMT}{Content-Type: application/java-archive}{Content-Length: 3041086}{Connection: keep-alive}{Cache-Control: public, max-age=28800}{content-disposition: attachment; filename="forge-1.20.1-47.4.11-userdev.jar"; filename*=utf-8''forge-1.20.1-47.4.11-userdev.jar}{content-security-policy: sandbox}{last-modified: Fri, 21 Nov 2025 18:09:42 GMT}{Age: 470}{Accept-Ranges: bytes}{cf-cache-status: HIT}{Nel: {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}}{Speculation-Rules: "/cdn-cgi/speculation"}{Vary: accept-encoding}{Server-Timing: cfCacheStatus;desc="HIT"}{Server-Timing: cfEdge;dur=13,cfOrigin;dur=0}{Report-To: {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=Ya6RQZCL60%2F06yOupnoZeHgtY06HJq9Xi4Py8YojMaKAYlFl3cRNdALRQEw0BZKU9TiOF%2FhkfwrelG4G%2BBjn9dAWNURC5nvcZRGK9yUyOiiiQdu9ewY%3D"}]}}{Server: cloudflare}{CF-RAY: 9a43187178af5c24-TLL}{alt-svc: h3=":443"; ma=86400}
2025-11-26T01:09:19.318+0700 [LIFECYCLE] [org.gradle.cache.internal.DefaultFileLockManager]
2025-11-26T01:09:19.318+0700 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Waiting to acquire shared lock on daemon addresses registry.
2025-11-26T01:09:19.318+0700 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Lock acquired on daemon addresses registry.
2025-11-26T01:09:19.318+0700 [DEBUG] [org.gradle.cache.internal.DefaultFileLockManager] Releasing lock on daemon addresses registry.

full log
https://mclo.gs/l4t7s2S

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Installing Forge problems

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