cheftonberry Posted August 30, 2014 Posted August 30, 2014 I just installed eclipse and forge src, I get this error when I try to start Minecraft with eclipse... [22:36:38] [main/ERROR]: Unable to launch java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20] at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20] at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?] at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?] Java HotSpot 64-Bit Server VM warning: Using incremental CMS is deprecated and will likely be removed in a future release //I tried this with both 1.7.10 and 1.7.2 Forge src Quote
shieldbug1 Posted August 30, 2014 Posted August 30, 2014 Read the EAQ. Quote BEFORE ASKING FOR HELP READ THE EAQ! I'll help if I can. Apologies if I do something obviously stupid. If you don't know basic Java yet, go and follow these tutorials.
robin4002 Posted August 30, 2014 Posted August 30, 2014 java.lang.ConcurrentModificationException before Minecraft loads: Do NOT use Java 8 (for now' date=' it's being worked on)![/quote'] Quote
cheftonberry Posted August 30, 2014 Author Posted August 30, 2014 I already switched from java 8, is there still something still attempting to use the java 8 that I wiped and replaced for 7? I'll try to re-install everything and make sure its trying to use 7 edit: Yeah ok that did it, I deleted any trace of java 8 and re-installed eclipse and it works now, thanks guys. Quote
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