Checklist for "Data Unavailable" Run-Time Error in CP/M

PSS ID Number: Q20119
Article last modified on 11-16-1992

4.68
CP/M-80

Summary:
   Make sure you have done the following if you receive the "Data
Unavailable" run-time error:
   1. An attempt has been made to READ from a file that has not been
      OPENed.
   2. The program manipulates a variable that has not been initialized,
      by using VALUE or MOVE.
   3. The file type does not match the ORGANIZATION IS clause.

Copyright Microsoft Corporation 1992.