How to increase heap size in JVM??

Hello all,
Iam trying to deploy an EAR file from JBuilder6 to WebLogic6.1 and Iam running into java.lang.OutOfMemoryError in JBuilder!!..Can someone tell me how to overcome this problem.
TIA

there are a set of config files in the JBuilder directory (bin directory I think - removed JBuilder a while back) that specify JVM arguments, what JVM to run etc.
Chuck

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