[Info-vax] Command Procedure - FORTRAN

[HCorte]

Trying to create the following command procedure that accepts two variables from the command line and compile .f and then link .obj for a fortran program.

But when reachs the line:
   FORTRAN FILENAME+".F"
instead of replacing the variable for the inputed value that the user inserted it tries to run FORTRAN FILENAME.F instead, is there a way to make it replace the variable for its values before it runs the command: FORTRAN ??? 

$ !compile and link script example to later on
$ !change make a double of dfor and dlink with flag for debug mode
$ INQUIRE DEBUG-
  "enter command to compile and link with debug mode on or off (yes or `
$ INQUIRE FILENAME-
  "enter the file name to compile and link?"
$ IF DEBUG .EQS. "YES"
$    THEN
$        WRITE SYS$OUTPUT "DEBUG MODE ON"
$        WRITE SYS$OUTPUT FILENAME+".TXT"
$        EXIT
$    ELSE
$        IF DEBUG .EQS. "NO" THEN
$           WRITE SYS$OUTPUT "DEBUG MODE OFF:"+FILENAME
$           FORTRAN FILENAME+".F"
$           LINK/EXE=FILENAME+".EXE" FILENAME+".OBJ"
$           EXIT
$        ENDIF
$ ENDIF
$ WRITE SYS$OUTPUT "Invalid option only yes or no repeat the process"-
$ +" again"