Minecraft Forums

I'm trying to run vanilla 1.4.7, and it comes up with this error:

---- Minecraft Crash Report ----
// I feel sad now

Time: 2/12/19 4:10 PM
Description: Failed to start game

java.lang.NullPointerException
at java.io.Reader.<init>(Reader.java:78)
at java.io.InputStreamReader.<init>(InputStreamReader.java:97)
at bn.a(SourceFile:56)
at bn.a(SourceFile:91)
at net.minecraft.client.Minecraft.a(SourceFile:249)
at asq.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(SourceFile:515)
at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 53841032 bytes (51 MB) / 100663296 bytes (96 MB) up to 2147483648 bytes (2048 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.9.0
OpenGL: Intel(R) UHD Graphics 620 GL version 4.5.0 - Build 24.20.100.6170, Intel
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: ~~ERROR~~ NullPointerException: null

If anyone knows what the issue is, please help me

Use separate game directories for old versions.

Thanks! It worked.