The document provides details about status codes in IBM i that identify errors. Program status codes range from 00100 to 00999 and file status codes range from 01000 to 01999. Codes 00000 to 00050 indicate normal operation. Commonly used status codes and their meanings are listed, such as 00112 for an invalid date and 01211 for a file not being open. An example program uses the %ERROR and %STATUS functions to check for errors and specific status codes when opening, reading from, and updating a file.

1.  %STATUS
%STATUS provides a five-digit status code that identifies the error.
Program status codes are in the range 00100 to00999 and File status codes are in the range 01000 to 01999.
Status codes in the range00000 to 00050 are considered to be normal (i.e., they are not set by an
exception/errorcondition).
We can see all the program/file related system messages using the command below:
DSPMSGD RANGE(*FIRST *LAST) MSGF(QRNXMSG) DETAIL(*BASIC)
The below table lists some of the commonly used Status Codes:
MSG ID MESSAGE DETAIL
00100
00102
00112
00121
00122
00202
00211
00222
00401
00413
00414
00415
00907
01021
01211
01218
01221
Value out of range for string operation
Divide by zero
Invalid Date, Time or Timestamp value.
Array index not valid
OCCUR outside of range
Called program or procedure failed
Error calling program or procedure
Pointer or parameter error
Data area specified on IN/OUT not found
Error on IN/OUT operation
User not authorized to use data area
User not authorized to change data area
Decimal data error (digit or sign not valid)
Tried to write a record that already exists (file being used has unique keys
and key is duplicate, or attempted to write duplicate relative record number to
a subfile).
File not open.
Record already locked.
Update operation attempted without a prior read.
Example
ERROR HANDLING USING E-OPERATOR EXTENDER AND %ERROR BUILT-IN FUNCTION
Columns . . . :
6 80
AMITCC/QRPGLESRC
SEU==>
E_OP_EXTND
FMT H HKeywords++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
*************** Beginning of data ************************************************
0001.00 HOPTION(*SRCSTMT)
0002.00 FCUST
UF A E
DISK
USROPN
0003.00
0004.00 C
1
SETLL(E) CUSTR
0005.00 C
EXSR
@ERROR
0006.00 C
EVAL
CSNAME='CCC'

2. 0007.00 C
UPDATE(E) CUSTR
0008.00 C
EXSR
@ERROR
0009.00 C
SETON
LR
0010.00 *
0011.00 C
@ERROR
BEGSR
0012.00 C
IF
%ERROR()
0013.00 C
IF
%STATUS(CUST)=1211
0014.00 C
OPEN
CUST
0015.00 C
ELSEIF
%STATUS(CUST)=1221
0016.00 C
READ(E)
CUST
0017.00 C
EVAL
CSNAME='CCC'
0018.00 C
UPDATE(E) CUSTR
0019.00 C
ENDIF
0020.00 C
ENDIF
0021.00 C
ENDSR
****************** End of data **************************************************