| "1" |
(sequentially accessed indexed files) Indicates a sequence error. The ascending sequence requirements of successive record key values have been violated (see the topic The WRITE Statement), or the prime record key value has been changed by the COBOL runtime element between the successful execution of a READ statement and the execution of the next REWRITE statement for that file. |
| "2" |
(relative and indexed files only) Indicates a duplicate key value. An attempt has been made either to write a record that would create a duplicate prime record key or to write or rewrite a record that would create a duplicate alternate record key when the DUPLICATES phrase is not specified for that alternate record key. |
| "3" |
(relative and indexed files only) Indicates no record found. An attempt has been made to access a record, identified by a key, and that record does not exist in the file, or a START or READ statement has been attempted on an optional input file that is not present. |
| "4" |
(relative and indexed files only) Indicates a boundary violation arising from one of the following conditions:
- An attempt has been made to write beyond the externally defined boundaries of a file.
- A sequential WRITE statement has been attempted for a relative file, but the number of significant digits in the relative record number is larger than the size of the relative key data item described for the file.
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