Why not use
// F <CICS APPLID>,CECI EXEC LINK PROGRAM(....)
although the questions arise, why do you need to execute the same program in 20 regions? is this a one-off action or something that needs to be done daily / hourly / weekly / monthly or on some other schedule? If not a one-off, why not use the CICS facilities to execute the program? etc, etc, etc -- LOTS of questions.