| Text | ESY5981 Invalid value specified (BLKCTRL/BLKSIZE/LRECL). | 
| Explanation | Invalid value for BLOCK CONTROL, BLOCK SIZE or RECORD LENGTH specified. | 
| Action | Please correct error. | 
| Text | ESY5982 Error during use of ISAM-key. | 
| Explanation | 
Possible reasons:  - duplicate key detected for DUPEKY=NO
                   - key must be generated, but KEYLEN is greater
                     than 8 bytes or no default KEYPOS
                   - key length of file is greater than 253 bytes
                   - key not found in ISAM-file
                   - no key supplied for UPDATE-INPLACE=YES
                   - invalid key sequence detected
 | 
| Action | Please check parameters or file attributes. | 
| Text | ESY5983 ... not supported in .... | 
| Explanation | Some views or features are not supported under certain circumstances. Example: View EVENTING is not supported in single user mode on BS2000. | 
| Action | No action possible. | 
| Text | ESY5984 Server is not authorized to access. | 
| Explanation | ESY Server Task is not authorized to access various objects with protection attributes, which not allows access for $TSOS. | 
| Action | No action possible. | 
| Text | ESY5985 Access to tape file not allowed. | 
| Explanation | Access to tape file was requested, but parameter TAPES=NO is specified in ESY startup file. | 
| Action | Please contact your ESY Administrator. | 
| Text | ESY5986 No or not enough space for .... | 
| Explanation | Various startup parameter sizes are exceeded. See variable text for details. | 
| Action | Please contact your Entire System Server administrator. | 
| Text | ESY5987 Job Variable already exists. | 
| Explanation | An existing job variable cannot be allocated again. | 
| Action | Please check your input values. | 
| Text | ESY5988 Invalid task type detected. | 
| Explanation | Task type must have a value between 1 and 7. | 
| Action | Correct program. | 
| Text | ESY5989 Invalid ELEMENT specification. | 
| Explanation | Element name must be unique. | 
| Action | Correct element name. | 
| Text | ESY5990 Field RECORD not found in format buffer. | 
| Explanation | An attempt was made to read a record without specifying the RECORD field. | 
| Action | Supply field RECORD in program. | 
| Text | ESY5991 Unknown product. | 
| Explanation | An invalid PRODUCT value was specified. | 
| Action | Specify valid product code. | 
| Text | ESY5992 Requested job variable not found. | 
| Explanation | The requested job variable is not cataloged. | 
| Action | No action required. | 
| Text | ESY5993 Cannot open file. | 
| Explanation | An open request failed. | 
| Action | No action required. | 
| Text | ESY5994 File not on volume. | 
| Explanation | The requested data set is not on the specified volume. | 
| Action | No action is required. | 
| Text | ESY5995 File not in catalog. | 
| Explanation | The data set is not catalogued. | 
| Action | Specify VOLSER, or catalog data set. | 
| Text | ESY5996 Volume not online. | 
| Explanation | The specified volume is currently not available. | 
| Action | Contact operator or systems programmer. | 
| Text | ESY5997 Data set is not PDS or sequential. | 
| Action | No action is required. | 
| Text | ESY5998 MEMBER not found. | 
| Explanation | The requested member was not found. | 
| Action | No action is required. | 
| Text | ESY5999 Entire System Server node ... not active. | 
| Action | Contact operator or systems programmer. |