Open I-O on non-mass storage device

  Explanation:  The program attempted to execute an OPEN statement for
  random or dynamic access on a file that is not a disk file.  Non-disk
  files cannot perform random access.

  User Action:  You must take the following actions:

      a. Check the program logic, and verify that the file being
         opened is the one you intended.

      b. Change the access mode to sequential, or move the file to a
         disk device.