CPYFRMIMPF V5R3 error?

We just upgraded to a new 520 running V5R3 (from V4R5) and are 
experiencing trouble with CPYFRMIMPF in a process that worked flawlessly 
prior to the conversion.

Nothing has changed (that I know of), it still works on the old machine/OS 
version. The From and To files and the FDF are all the same.

I'm getting error CPF2845 - The copy did not complete for reason code 7.
   7 - The FROMFILE numeric field *N contain blank characters, or other 
 characters that are not valid for a numeric field. 

This is my Command,

CPYFRMIMPF FROMFILE(SVFDTA/CPOFILE) 
           TOFILE(SVFDTA/MAN010P) 
           MBROPT(*ADD) 
           DTAFMT(*FIXED) 
           RMVBLANK(*NONE) 
           FLDDFNFILE(SVFSRC/QDDSSRC MAN010PFDP)
           FROMRCD(1 5) 

So, what changed from V4R5 to V5R3 to muck this up? I read some stuff in 
the KB about CCSID differences, do I need to take that into heavy 
consideration? The CCSID on the Fromfile is 500, the CCSID of the Tofile 
is 37.

Ron Adams
Information Technology Group
Crane Valves
9200 New Trails Dr. Suite 200
The Woodlands, TX 77385