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Why do I get an error "java.lang.OutOfmemoryError :Java heap space" in CaliberRM SDK?

Why do I get an error "java.lang.OutOfmemoryError :Java heap space" in CaliberRM SDK?


Why do I get an error "java.lang.OutOfmemoryError :Java heap space" in CaliberRM SDK?


  • Product Name: CaliberRM
  • Product Version: 2005 R2 SP1
  • Product Component: SDK
  • Platform/OS Version: All

This is due to a known SDK COM problem and the Dot Net garbage collection. Normally to make sure we don?t receive the above error we would set the maximum memory flag of the Java Virtual Machine (JVM) so as the Java Heap Space would not run out of memory. See sample code below:

Dim objStJavaVMInfo As IStJavaVMInfo

" Get the current VM from the initializer...

Set objStJavaVMInfo = objInitializer.JavaConfiguration.CurrentJavaVM

" Set the max memory flag to 1000 MB...

objStJavaVMInfo.Options = "-Xmx1000M"

Unfortunately this code does not set the memory flag

As a workaround in Visual Basic.Net you would normally make an object equal to ?Nothing? to dereference it. The garbage collection system will then free up memory referenced to by this object. To do this use the code Obj = Nothing. Unfortunately this is not the case, when referencing the COM objects in .NET automatically wraps those references in something called RCW (Runtime Callable Wrapper). "UNMANAGED" objects are dealt with within the "MANAGED" .NET environment through the RCW. To make sure that the RCW objects are released we need to call the method


This method is part of the "System.Runtime.InteropServices"

Calling this method will dereference the object and allow the garbage collection system to free up memory:

my_req = my_session.getRequirement(id_number)


my_req = Nothing

Old KB# 15876


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