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.
