# AG error types

AG boards record boot time and runtime errors in the agpierror.log file. By default, agpierror.log is located in \nms\oam\log (for Windows) and in /opt/nms/oam/log (for UNIX).

AG boards return the following types of errors, depending on the problem encountered:

Error type | Description
--- | ---
8000 | System errors (not channel specific)
8100 | DSP driver errors
8200 | System errors (channel specific)
8400 | TCP manager errors (not channel specific)
8500 | GTP engine errors (not channel specific)
9a00 | HMIC errors
9900 | Digital line and clocking errors
8d00 | Voice Message service errors
9100 | DSP service layer errors
FF00 | Host driver errors

Topics in this section contain AG error messages in table format organized by error type. Refer to the specific error code table for the error code, error name, description, and category of each error message.

For information about the format of the error message, refer to AG error format.

## Error categories

The Category column in each error code table uses the numerals 1 through 5 to describe the cause of the error message. The following table defines the categories of returned errors:

Category | Description
--- | ---
1 | Application or programming error.
2 | Serious board problem. Contact NMS Communications.
3 | Serious internal error. Contact NMS Communications.
4 | Software configuration error. Check the current configuration, and modify as required.
5 | Hardware configuration error. Check cables and connectors.