| Name/Description | Value |
| CMLOG_SUCCESS | 0 |
| Execution finished successfully. | |
| CMLOG_ERROR | -1 |
| Execution finished abnormally. | |
| CMLOG_INVALIOBJ | 1 |
| Invalid cdev object. | |
| CMLOG_INVALIDARG | 2 |
| Caller uses wrong arguments. | |
| CMLOG_INVALIDSVC | 3 |
| Wrong cdev service | |
| CMLOG_NOTCONNECTED | 4 |
| Logging clients or browsers are not connected to the server. | |
| CMLOG_IOFAILED | 5 |
| Low Level I/O operations failed. | |
| CMLOG_CONFILICT | 6 |
| conflicts of data types or tags | |
| CMLOG_NOTFOUND | 7 |
| Query process find no answer. | |
| CMLOG_TIMEOUT | 8 |
| Connection timeout | |
| CMLOG_CONVERT | 9 |
| cdevData conversion error | |