ST22 Runtime Errors - memory_pgfree_failed

Just as of recently we are receiving a large number of these MEMORY_PGFREE_FAILED dumps. It states that it terminated because the ABAP processor detected an internal system error.

On error analysis, it states the internal error occurred when releasing memory in SAP paging. The release ended with the error code "-1".

Some info regarding out system.

SAP release: 620

OS: OS400

SAP Kernel: 640

Patch level: 201

I am hoping someone can give me some insight on where to get a better understanding of why this is happening and what I can do to stop it.

Thanks for any help.

Ryan