IBM 5280 Programmer's Manual page 164

Status Key Return Codes
Relative, Sequential, and Transaction Data Set Organization
Table 3: READ, WRITE, and REWRITE Status Codes
Status Key COBOL Detected Error
00
No error detected
10
End of file sequential access
22
Duplicate key random access
23
No record found random access
24
Boundary error (relative file) possibly caused by an empty data set.
30
I/0 Error See table 7 for additional causes.
34
Boundary error (sequential file)
92 Invalid request. For example: a WRITE or READ attempted on an
unopened data set; a WRITE attempted on a file opened for input only.
File is not open
Second attempt to open a TRANSACTION I/0 file
Transaction I/O -
2
WRITES in SEQ
Invalid sequence of READ/WRITE requests in TRANSACTION I/O.
REWRITE, DELETE during sequential access not preceded by
successful READ
93
See Table 7 for detailed explanations.
94
Current record pointer is undefined for the READ request (for
sequential access mode only).
95
For relative files, a delete character was not specified when the data set
was allocated.
Appendix B. Status Key Return Codes B- 3