Cannot open 1.4.7

[YankelMyWankel]

Title Cannot open 1.4.7

Launcher Type Vanilla

Modpack FTB Ultimate

Modpack version 1.4.7

Have you modified the pack? No

Link to log file

Details of the issue Tried adding 1.4.7 launcher in the legit minecraft version ... getting the below error.



---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 6/21/17 11:10 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_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 177651320 bytes (169 MB) / 255066112 bytes (243 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
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: GeForce GTX 980/PCIe/SSE2 GL version 4.5.0 NVIDIA 382.33, NVIDIA Corporation
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

 

[Henry Link]

So in 1.4.7 adding a mod isn't as simple as dropping it in the mods folder. You have to resolve item ID conflicts, and possibly other ID conflicts. One of the reasons I didn't mess with adding mods much in the 1.4.7 version of minecraft.

 

[grandrolf]

Details of the issue Tried adding 1.4.7 launcher in the legit minecraft version ... getting the below error.

Why not use Twitch or the legacy launcher?

(what do you mean with legit minecraft version?)