RTC 4.0.1 IBM i Builds

Hello,

I have a relatively new RTC install and I cannot builds working. The following message occurs.

 [ibmiPreBuild] Thread[main,5,main]  Thu Jul 11 11:44:51:771 BST 2013  Value found in system properties:  '/home/UserProfile/ToolboxTrace.txt'
* Unhandled exception
* Type=Illegal instruction vmState=0x00040000
* J9Generic_Signal_Number=00000010 Signal_Number=00000004 Error_Value=00000000 Signal_Code=00000033

I am trying to build objects on an IBM i,

Any ideas what could be causing this error?

Thanks

Len