If your program runs in a multi-user environment, you should always check for the following file status codes:
| File Status Code | Description |
|---|---|
| 9/065 | This status code is returned by an OPEN statement and indicates that the file is locked. |
| 9/068 | This status code is returned by a READ, DELETE or REWRITE statement and indicates that the record is locked. |
| 9/213 | This status code indicates that the maximum number of permitted locks has been reached. The maximum number of permitted locks depends on your network and/or operating system. |