After upgrading IDEAL and IPC to 15.1 or making CICS changes receiving the following error on signon to Ideal:
IDADERRP02E - INTERR: Internal system error
SRVC=VPE FUNC=$CSP RC=002 PGM=ADIDIN 15.1 +5B86
CALPGM= CURACT= ACTTYP= USER=aaa ERRID=ADIDIN-6
SYS=BD1 ENTTYP= ENTNAM= ENTVER=000 ENTSTAT=
Release : 15.1
VPE function $CSP is CALL SUBPROGRAM and RC=02 means the program does not exist.
Either a load library is missing or a PCT entry for a program is missing.
If the problem occurs signing on to Ideal it could be a signon exit is missing.
Issue command DIS SES ENV, it will show if there is a signon exit defined, look for SIGNON-EXIT.
To change the exit use SET SITE ENV SIGNON-EXIT exit_name
To remove the signon exit use SET SITE ENV SIGNON-EXIT NONE
See documentation sections SET SITE Commands and SET ENVIRONMENT Command