Using ASMIDF to debug a CICS/VSE application

ASMIDF does not run under CICS. It is possible, however, to run CICS/VSE under ASMIDF as for a batch application. Here's how:

Ensure the CICS job's LIBDEF search list includes the Toolkit and HLASM sublibraries plus any libraries that contain REXX procs, ASMLANGX file, and so on, to be used in the IDF session.

Replace the EXEC DFHSIP statement with the following:

// SETPFIX LIB=144K
// EXEC ASMIDF,SIZE=9M,PARM=DFHSIP (LU luid/SI'                     X
               DSPACE=2M
SIT=??
DCT=??
GRPLIST=VSELST
START=AUTO
EXTSEC=NO
SVD=NO
ICVR=0
TCT=??
APPLID=??
$END

where ?? are installation dependent luid is the LU of the terminal at which the IDF session is to be run ICVR=0 is required

When the IDF command line appears, issue a deferred breakpoint for the application program that is to be debugged: DBREAK (program-name.)+x'20'
Allow IDF to RUN so that CICS can start.
Once CICS is up, run the transaction that involves the program for which the DBREAK has been issued. IDF should then display a breakpoint at entry to the program.