Session terminated while activating / compiling class

Hi,

when activating / compiling the class /PE1/CL_E_PHASE_RELSTAT in SE24 in one of our development systems (ABR), the workprocess is re-started and the session ended.

Now this same class works in a another system (XAJ) just fine.

The differences between the systems is that system XAJ is at a LOWER support package than ABR.

XAJ SP level = 05

ABR SP level = 12

Any suggestions would be highly appreciated.

Thanks,

Giwan Persaud