How to switch from Classic REXX to Object Rexx and vice versa

To switch from Object REXX to Classic REXX or vice versa execute 

 
  switchrx

in an OS/2 window and reboot the machine. 

If you want to use the WPS support of Object REXX (only possible if Object 
REXX is the active REXX interpreter!) you must activate it using 

 
  wpsinst +

in an OS/2 window. 
Use wpsinst with the parameter - to deactivate the WPS support (see also 
Object REXX and the WPS) 
Note that due to a bug in wpsinst.cmd the "wpsinst ?" does not work as 
expected: There's no output at all if the WPS support is not registered. 

To check, which REXX version is currently running execute 

 
  rexxtry parse version t; say t;

in an OS/2 command window. 

If the output is similar to OBJREXX 6.00 18 May 1999 your current REXX 
interpreter is Object REXX else not. 

(see also Using Classic REXX if Object REXX is the default REXX)