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  1.  Home
  2. RPG400-L
  3. February 2013

Re: Maintaining Service Program signatures

Hi,

IBM signatures do not include any information about the parameters of exported procedures. This is a common misconception.

ILE Signatures are computed over the names of the exported procedures, the number of exported procedures, and their order (sequence). Period.

Please re-read the excerpt (below) from a previous post carefully:

==========
... just memorize the rule: ALWAYS add new exported procedures to the very bottom of the list in the binder source, and REMEMBER to add them to the exported prototypes, and ALWAYS add any new parameters you're adding to a procedure to the BOTTOM of the list of parameters and in the code check the number of parameters before using the new one, That way you can keep your signature the same and programs that use "pre-existing" procedures will not break.
==========

This is very important to understand, or you will likely get burned.

All the best,

Mark S. Waterbury

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