accessing non-MAPICS files from within MAPICS

I am moving from a model 500 to a model 270; OS/400 version 5.1 and Mapics
5.5. I have restored the system (OS/400, applications and data from the 500
to the 270). All software licenses have been applied and I can execute all
of the applications. When I attempt to access ROBOT or a custom program with
nonMAPICS files from within a MAPICS environment I get these messages:

 Pointer not set for location referenced.
 File RBTOP1 in library ROBOTLIB member or device RBTOP1 not opened.

I can execute the same commands and options from outside of MAPICS and they
run just fine.

What am I missing here? The first problem we had was the routing entries
needed to be setup. Are there more items that were possibly not brought
forward? Is there a MAPICS manual that I can review for this?

Thanks in advance for your time and assistance.
Jon Le Roi
Director of Information Systems
Tegal Corporation