MF NE 3.1 Call fails to pass linkage

I have one program calling another - "call using link-area." - using a
simple linkage:
01 link-area.
03 link-company pic 9(3).
03 link-lease-no pic 9(10).
In the called program, the same structure exists in the linkage section.
When animating, stepping thru the call, the 1st reference to link-company in
the called program gives the error "203 CALL parameter not supplied". I
cannot find error 203 anywhere, but the call should be working correctly. I
have current patches to my 3.1. Any ideas what's happening? TIA, Paul


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