MFPLI00586S Assignment of an arithmetic type to POINTER is not valid; -nolaxptr is in effect.

Assignment of computational types to POINTER is invalid; -nolaxptr is in effect under -mvs.

Use the -laxptr compile option to allow this.

Resolution:
Use the POINTERVALUE built-in to cast the computational type to POINTER, or use the -laxptr compile option.
Module:
INTRP2.PL1