All, We have some library routines written in C that we were able to call from Fortran 77 using Pragma to inform the compiler that a function call is a call to a C language function. For example: INTEGER*2 CLISAM ! C function EXTERNAL CLISAM !$Pragma C (CLISAM) . . I2ERR = CLISAM( ) We have recently upgraded to an EPC Fortran-90 compiler, Version 1.5. The above code does not work. Does anyone know what I need to do? I suspect that I can use the INTERFACE statement, but I have not be able to find any examples. Thanks in advance for a prompt reply. -Ross Pittman %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%