| Error Code | Description | 
|---|---|
| RT001 | Insufficient buffer space. On OS/2, could indicate that the SWAPPATH has not been set correctly or the SWAPPATH drive is full. Could also indicate an out of memory situation. | 
| RT002 | File not open when access tried. | 
| RT003 | Serial mode error. | 
| RT004 | Illegal file name. | 
| RT005 | Illegal device specification. | 
| RT006 | Attempt to write to a file opened for input. | 
| RT007 | Disk space exhausted. | 
| RT008 | Attempt to input from a file opened for output. | 
| RT009 | No room in directory (also, directory does not exist). | 
| RT010 | File name not supplied. | 
| RT012 | Attempt to open a file which is already open. | 
| RT013 | File not found. | 
| RT014 | Too many files open simultaneously. | 
| RT015 | Too many indexed files open. | 
| RT016 | Too many device files open. | 
| RT017 | Record error: probably zero length. | 
| RT018 | Read part record error: EOF before EOR or file open in wrong mode. | 
| RT019 | Rewrite error: open mode or access mode wrong. | 
| RT020 | Device or resource busy. | 
| RT021 | File is a directory. | 
| RT022 | Illegal or impossible access mode for OPEN. | 
| RT023 | Illegal or impossible access mode for CLOSE. | 
| RT024 | Disk I/O error. | 
| RT025 | Operating system data error. | 
| RT026 | Block I/O error. | 
| RT027 | Device not available. | 
| RT028 | No space on device. | 
| RT029 | Attempt to delete open file. | 
| RT030 | File system is read only. | 
| RT031 | Not owner of file. | 
| RT032 | Too many indexed files, or no such process. | 
| RT033 | Physical I/O error. | 
| RT034 | Incorrect mode or file descriptor. | 
| RT035 | Attempt to access a file with incorrect permission. | 
| RT036 | File already exists. | 
| RT037 | File access denied. | 
| RT038 | Disk not compatible. | 
| RT039 | File not compatible. | 
| RT040 | Language initialization not set up correctly. | 
| RT041 | Corrupt index file. | 
| RT042 | Attempt to write on broken pipe. | 
| RT043 | File information missing for indexed file. | 
| RT045 | Attempt to open an NLS file using an incompatible program. | 
| RT047 | Indexed structure overflow. (Could indicate that you have reached the maximum number of duplicate keys.) | 
| RT065 | File locked. | 
| RT066 | Attempt to add duplicate record key to indexed file. | 
| RT067 | Indexed file not open. | 
| RT068 | Record locked. | 
| RT069 | Illegal argument to ISAM module. | 
| RT070 | Too many indexed files open. | 
| RT071 | Bad indexed file format. | 
| RT072 | End of indexed file. | 
| RT073 | No record found in indexed file. | 
| RT074 | No current record in indexed file. | 
| RT075 | Indexed data file name too long. | 
| RT077 | Internal ISAM module failure. | 
| RT078 | Illegal key description in indexed file. | 
| RT081 | Key already exists in indexed file. | 
| RT100 | Invalid file operation. | 
| RT101 | Illegal operation on an indexed file. | 
| RT102 | Sequential file with non-integral number of records. | 
| RT104 | Null file name used in a file operation. | 
| RT105 | Memory allocation error. | 
| RT129 | Attempt to access record zero of relative file. | 
| RT135 | File must not exist. | 
| RT138 | File closed with lock - cannot be opened. | 
| RT139 | Record length or key data inconsistency. | 
| RT141 | File already open - cannot be opened. | 
| RT142 | File not open - cannot be closed. | 
| RT143 | REWRITE/DELETE in sequential mode not preceded by successful READ. | 
| RT146 | No current record defined for sequential read. | 
| RT147 | Wrong open mode or access mode for READ/START. | 
| RT148 | Wrong open mode or access mode for WRITE. | 
| RT149 | Wrong open mode or access mode for REWRITE/ DELETE. | 
| RT150 | Program abandoned at user request. | 
| RT151 | Random read on sequential file. | 
| RT152 | REWRITE on file not opened I-O. | 
| RT158 | Attempt to REWRITE to a line-sequential file. | 
| RT159 | Malformed line sequential-file. | 
| RT161 | File header not found. | 
| RT173 | Called program not found. | 
| RT180 | End-of-file marker error. | 
| RT182 | Console input or console output open in wrong direction. | 
| RT183 | Attempt to open line sequential file for I-O. | 
| RT188 | File name too large. | 
| RT193 | Error in variable length count. | 
| RT194 | File size too large. | 
| RT195 | DELETE/REWRITE not preceded by a READ. | 
| RT196 | Record number too large in relative or indexed file. | 
| RT210 | File is closed with lock. | 
| RT213 | Too many locks. | 
| RT218 | Malformed MULTIPLE REEL/UNIT file. | 
| RT219 | Operating system shared file limit exceeded. |