The SET SOURCE/MODULE=module-name command establishes a source
    directory search list for a particular module. The SET SOURCE
    command establishes a source directory search list for all
    modules not explicitly mentioned in a SET SOURCE/MODULE=module-
    name command. When you have used those commands, SHOW SOURCE
    identifies the source directory search list associated with each
    search category.

    If a source directory search list has not been established by
    using the SET SOURCE or SET SOURCE/MODULE=module-name command,
    the SHOW SOURCE command indicates that no directory search list
    is currently in effect. In this case, the debugger expects each
    source file to be in the same directory that it was in at compile
    time (the debugger also checks that the version number and the
    creation date and time of a source file match the information in
    the debugger's symbol table).

    The /EDIT qualifier is needed when the files used for the display
    of source code are different from the files to be edited by using
    the EDIT command. This is the case with Ada programs. For Ada
    programs, the SHOW SOURCE command identifies the search list of
    files used for source display (the copied source files in Ada
    program libraries); the SHOW SOURCE/EDIT command identifies the
    search list for the source files you edit when using the EDIT
    command.

    For information specific to Ada programs, see the
    Language_Support Ada help topic.

    Related commands:

       (SET,CANCEL) SOURCE