Following is a list of the secondary error codes for transaction error 01.
| Secondary Error | Corresponding File Status Error | |
| 01 | operating system error (see tertiary code for system-specific error code) | 30 |
| 02 | illegal parameter | 39,01 |
| 03 | attempt to open more files than system allows | 94,10 |
| 04 | open mode does not allow operation | 48,01
49,01 |
| 05 | requested record is locked | 99 |
| 06 | index file is corrupt | 98,xx |
| 07 | duplicate key where duplicates not allowed | 22 |
| 08 | requested record not found | 23 |
| 10 | disk became full while adding a new record | 24 |
| 11 | file locked against requested open mode | 93 |
| 12 | record size mismatch during rewrite | 44 |
| 14 | out of dynamic memory | 9A |
| 15 | requested file does not exist | 35 |
| 16 | inadequate access permissions to file | 37,07 |
| 17 | requested operation not supported | 9B |
| 18 | out of lock-table entries | 9C |
| 19 | file-system specific error | 9D |