Validate the library

File Manager allows users to enter a copybook library name and member name on many panels. By means of FMNCRAEX File Manager will allow multiple types of copybook libraries without having to specify the type.

The exit must be able to take a library name passed to it and determine whether it is a library which the exit supports. The possible results are:

  1. Yes: the exit supports this library.
  2. No: the exit does not support this library. File Manager should try other access methods (for example, CA-Panvalet or PDS I/O) but should not use the exit to access this data set.
  3. Unknown: the exit was unable to access the library for various reasons (for example, data set in use or security violation).