SYSOUT vs. QPRINT for debug-type information...

List,

Another ILE/COBOL newbie question. I was running a test program where I was 
issuing a lot of DISPLAY UPON SYSOUT messages for debug purposes. The job 
was cancelled by the system because "the size of the message queue for job 
xxx reached the maximum size". I see from the output that in addition to the 
lines I was interested in seeing there were lots of system-generated stuff 
that I did not care about.

In the mainframe world, we are used to using a lot of DISPLAY UPON SYSLST 
(if need be) and they just get routed to a different spooled entry which is 
separate from any of the other reports the program may generate. It's 
readily accessible if you happen to need it to verify a problem and easily 
discarded if you don't.

So, in the iSeries world, what is the "acceptable" way to create printed 
output for debug and tracking purposes? Coding a DISPLAY UPON SYSOUT is, of 
course, easier than defining and writing to a print file, but it's not a big 
deal if that is what must be done.

Your suggestions please? TIA