Program debug basics

Having prepared your program, you can use IDF to help you debug it.

A typical sequence of operations is:

Start the debugging session by invoking ASMIDF (IDF), specifying your program name, IDF options (if appropriate), and parameters to pass to your program.
Issue the LANGUAGE LOAD command to load the IDF Language extract files for all other program sections which are relevant to the problem being debugged.
Issue IDF commands to tailor your debugging environment and to determine where your program is in error. You can issue commands as IDF macros, or interactively at the command prompt.

Commands to IDF come from:

Entering them on the IDF command line.
Pressing PF keys, which issues the associated IDF command.
The IDF commands on PF keys are the default set of commands provided by IDF, or user commands, registered using the PFK command.
IDF macros (written in REXX).
User programs.