IFGT vs. IF

Consider the following code (the print file specs were the result of
CVTRPGSRC):

 Fqprint    o    f  132        printer infds(prntds) oflind(*inoa)

 D*
 Dprntds           ds
 D line#                 367    368b 0
 D*
 D fsttim          s              1    inz('y')

C                  if        line# > 63 or fsttim = 'y'

When I execute the program I get this error:

 Message ID . . . . . . :   RNQ0103       Severity . . . . . . . :   99
 Message type . . . . . :   Inquiry
 Date sent  . . . . . . :   03/01/08      Time sent  . . . . . . :
12:24:27

 Message . . . . :   The target for a numeric operation is too small to hold
the result (C G D F).

Cause . . . . . :   RPG procedure DMPMETRS in program LBFLIB/DMPMETRS at
statement 114
performed an arithmetic operation which resulted in a value that is too
large to fit in the target.
If this is a numeric expression, the overflow could be the result of the
calculation of some intermediate
result.

If I change to the following code:

 C     line#         ifgt      63
 C     fsttim        oreq      'y'

I get no execution error.  What's going on here?


Buzz Fenner
Programmer/Analyst
mailto:bfenner@jonesborocwl.org