OPS/REXX Considerations

Before using OPS/REXX, consider the following points:

OPS/REXX uses the following search order to locate external functions as it compiles a program:
1. Built-in functions.
2. The SYSEXEC concatenation or the ddname concatenation as specified in the REXXDDNAME product parameter.
3. When using non-REXX external functions, a LOAD issued for a module with the name of the external reference (that is, the standard z/OS load module search mechanism is used).
Avoid using OPS as the first characters of the names of REXX functions that you create because these names may conflict with built-in function names that may be added to the product in future releases.