forrtl: severe (157): Program Exception - access violation

I've added a main procedure to the source code of progam to run the software more and more. In Debug mode the program is excuted and I would be able to run the program. But when I change the running mode to "release", the program would be compiled successfully but when I debug the program there are the message "Unhandled exception at 0x0056da02 in HydrodynaicCali.exe: 0xC0000005: Access violation reading location 0xffffffff" and/ or "forrtl: severe (157): Program Exception - access violation".