I am surprised at the vitriole regarding 
IEFC657I THE SYMBOL xxx WAS NOT USED

Every time I have seen that message it was because the proc creator (me) 
screwed up (sometimes in a subtle way).

-- Ignoring that situation does not seem to be in the user's best 
interest. 
-- Warning about that situation is not either because no one will notice 
the warning.
-- Treating it as an error seems to me to be the right action. It has 
helped innumerable people over the years.

This is quite different than a compiler, for example, optimizing out 
something that proves not to be used.

This could not unconditionally be changed, for compatibility reasons. That 
says that an option such as "do not treat as an error" would have to be 
provided and used. Make the case that this is a good idea. None of the 
posts I read did so. 

Sure, one could ask for an option to "ignore" or "treat as warning" but if 
you knew enough to include that option, wouldn't you just "fix" the proc 
not to have extraneous unneeded stuff to help everyone not get confused?

Asking for improvement in the detection of use of a proc symbol, such as 
within the ParmDD SYSIN might be reasonable. It was implemented as it was 
because it was practical to do so. And the limitation that exists can be 
dealt with. It is not practical to have the system search through the Parm 
DD if the Parm DD is not inline so could not be done "in general". What 
would you sacrifice our doing in order to accommodate? It is always fair 
to ask; but it is also a requirement to understand that there are limited 
resources to be parceled out among worthy causes. Maybe one could consider 
an option such as "make a JCL symbol from every proc symbol, with some 
naming convention" that could make it easier to use the symbols from the 
proc in a Parm DD without having to do extra stuff, possibly incorporating 
"EXPORT SYMLIST=*" and the option (if needed) so that JCL symbols are 
processed within Parm DD (such as the current SYMBOLS=JCLONLY).

What am I missing?

Peter Relson
z/OS Core Technology Design


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