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Back in December, I was asking about finding all possible error codes for %dec(), the goal being to use %dec() + monitor to test if a character field contained only numbers.

In the interest of posting solutions to problems discussed here, I used something like ended up with something like:
monitor;
%dec(thevar)
on-error;
isNumber = *off

call QMHRMVPM to get rid of the unnecessary job log message.
endmon;

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