i use oorexx 3.1.1 on Windows Vista-RTM(32bit).
When trying to run rexx -v as standard-user, i get a message after a long delay: "Open Object Rexx API Manager(RXAPI.EXE) could not be started. This could be due a version conflict!"
If u run rexx -v as admin, it works.
Installing rxapi as service did not help.