Cause of the abend you encountered is the Intertest ISER transaction is being purged by some one or by TMOM. (see the message below). The Intertest ISER transaction should never be purged. The ISER transaction is the Intertest service transaction and runs for the life of Intertest in the CICS region and allows Intertest to function in the CICS environment.
14.47.54 STC04453 +DCICS01 DFHCQ0264I CEKL SET: PURGE request rejected, task number 07116 is not purgeable.
14.53.06 STC04453 +TMON0TX10 JOB:DCICS01 TRNM:ISER TASK:0007116.MSG:ABENDED FOR USER PURGE....................(.........)
14.53.06 STC04453 +DFHAP0001 DCICS01 An abend (code 0C1/AKEA) has occurred at offset X'FFFFFFFF' in module IN72SERV.