COBRT203 CALL parameter not supplied (Fatal)

The item you are trying to access in the Linkage Section of the currently executing program has not been initialized.

One possible cause is when an attempt has been made to access the record area, but it has not yet been allocated because a file is not yet in the OPEN state; see the HOSTFD directive for more details.

Resolution:

Recode your program to ensure that it contains all of the necessary parameters, or check that it is a valid caller.