File and FCD Handling and 64-bit Programs

The File Control Description (FCD) is a data area which contains information about the file in use.

There are two different formats of the FCD that you can directly code in your application, FCD2 and FCD3 (FCD 1 is obsolete and should never be used in your applications).

FCD2 is not supported on 64-bit COBOL systems. This has the following effects on application conversion: