Minecraft Forums

So since 1.5.2 came out, as I'm sure that you'll need to redownload all the mods you had before the update. I had Rei's Minimap, Modloader, and OptiFine in 1.5.1. And I redownloaded all of those and 1 more mod, Armor Status HUD. They're all 1.5.2 versions. And what you do is that you just open up the minecraft.jar in WinRAR, and drag the files of the mods exported into the .jar. Also deleting the META folder in there as well. So all 4 mods are put into the .jar and I launch the game to test it out if it works. I get a crash report saying 'Exeption in Modloader'; with a full error page report located below. I deleted .minecraft, relaunched to get files back. And put all of the mods in the .jar, all but modloader, and deleted METAzinf. After the launch, it just goes to the main menu with 'Minecraft 1.5.2' in the lower left. Nothing else, I'm really confused.

Here is the crash report. I do know a lot about computers but this one I can't figure out.


Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Exception occured in ModLoader

A full error report has been saved to C:\Users\Cj\AppData\Roaming\.minecraft\crash-reports\crash-2013-05-05_10.00.51-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash



--- BEGIN ERROR REPORT 29ed5654 --------
Full report at:
<directory taken out>
Please show that file to Mojang, NOT just this screen!

Generated 5/5/13 10:00 AM

-- System Details --
Details:
Minecraft Version: 1.5.2
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_21, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 411851184 bytes (392 MB) / 518979584 bytes (494 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, WrUpdates, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
ModLoader: Mods loaded: 1
ModLoader 1.5.2


java.lang.NoClassDefFoundError: Lbspkrs/util/ModVersionChecker;
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.lang.Class.getDeclaredFields(Unknown Source)
at ModLoader.setupProperties(ModLoader.java:1741)
at ModLoader.addMod(ModLoader.java:342)
at ModLoader.readFromClassPath(ModLoader.java:1103)
at ModLoader.init(ModLoader.java:736)
at ModLoader.addAllRenderers(ModLoader.java:205)
at bgy.<init>(RenderManager.java:97)
at bgy.<clinit>(RenderManager.java:14)
at net.minecraft.client.Minecraft.a(SourceFile:261)
at avv.a(SourceFile:56)
at net.minecraft.client.Minecraft.run(SourceFile:507)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: bspkrs.util.ModVersionChecker
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 14 more
--- END ERROR REPORT ec38eac3 ----------