Level check exception being thrown for no apparent reason

["James H. H. Lampert" <jamesl@xxxxxxxxxxxxxxxxx>]

This is happening on a pair of customer boxes One has both live and test 
data; the other has development tools.

I created a program (RPG) that accesses a file that has had some fields 
added in the test library, compared to what exists in the live library.

Obviously, compiled over the development box's live library, it's going 
to run just fine in the operational box's live library, but throw level 
check errors if you try to run it in the operational box's test library.

I updated the development box's test library to match the live library, 
and recompiled the program INTO that test library, OVER the reformatted 
file. The compilation listing shows the new fields. The file, member, 
and format level identifiers match for the test library versions of 
those files, from one box to the other.

Yet when I put this version of the program into the test library of the 
operational box, and try to run it over the test library's version of 
the file, it throws an immediate level check on that file!

Any idea what could be going on? Other than the gremlins having it in 
for me today?

--
JHHL