Using the REPLACE function on the mainframe with the following section in MAPCSV works OK on Windows in FDM:
,REPLACE, 01, ,
This is meant to replace 01 that has a preceding space character with a string of 3 spaces.
It fails on the mainframe with: 00048E Parameter 2 must be set
Release : 4.9
Component : CA Test Data Manager - Others
Enclose the values to be replaced in double quotes:
,REPLACE," 01"," ",
In general it is good practice to enclose strings in double quotes.