Access violation

I have a problem with the Fortran95 compiler. A window with an error message open : 'Exception:C:/program files (X86)/silverfrost/FTN95 express/FTN95.exe' 'Access violation' ''The instruction at address ......... attempted to read from location .......' ' Previously, there was no problem with the compiler. Could you please help me ? Thanks

Find out where the program is failing by using /checkmate and by using the debugger. If you can show us some code or more details of the failure report, that would help.