Problem:

Created a trivial project containing only 2 PLI programs.  Build "phase 6 of 10 Parsing" yields message "An error occurred in the selected preprocessor".  Checked licensing, and PLI option looks OK.

Attached please find the output of MFSupportInfo utility, a copy of RVIO.ini, all of the project files, and the two PLI programs.

Please note that these programs parsed fine on another machine, last year, using Revolve 6.2.

Resolution:

The root problem was that the customer was installing MFE, not MFE EE for PL/I, when an upgrade to a new machine was made.  Once this was done, the customer is able to parse the PL/I with Revolve project with no problem.