Invoking the target program

Properly invoking IDF can easily get you breakpoints in modules that get loaded by another. For example, here is what you do if you want to debug the program XYZZY that runs as an ISPF dialog, using TSO TEST:

Figure 1. Invoking an ISPF dialog using TSO TEST

    TEST 'SYS1.ISP.LINKLIB(ISPF)' CP
    ISPSTART PGM(XYZZY)
    AT XYZZY.XYZZY.+0 DEFER

Here is what you do using using ASMIDF:

Figure 2. Invoking an ISPF dialog using IDF

    ASMIDF ISPF (COMMAND/ISPSTART PGM(XYZZY)

once in IDF,
DBREAK (XYZZY.)

This can only be done if you are using SVC 97 for breakpoints.