Activation groups for beginners

 >> Numeric truncation - Like it or not, some programmers have come to
depend on the old truncation rules.  ...... For maximum compatibility, use
control spec TRUNCNBR(*YES) to restore the old rules for the initial
conversion.

"Restore" is not the right word here.  TRUNCNBR(*YES) is the default
behavior for RPG IV and always has been.  It is only on EVAL that you get an
error - ADD, MULT etc. behave the way they always have.  The *NO option was
introduced (V4R2?) for those who preferred truncation to cause an error the
way that EVAL does.

The other thing I might add to your list is that most people find *RESDECPOS
to be a useful default option when first using expressions because it uses
what (in my opinion) are more sensible rules when deciding the size of
intermediate results.

Jon Paris
Partner400