| Error Code | Name | Description |
|---|---|---|
| 0 | NL_SUCCESS | |
| 1 | NL_BAD_PARAMETER | Bad parameter to function |
| 2 | NL_NOT_INITIALIZED | Library not initialized |
| 3 | NL_INITIALIZED | Library already initialized |
| 16 | NL_INIT_TIMEOUT | Transaction timed out at start |
| 17 | NL_FRAMING | Transaction failed due to framing problem |
| 256 | NL_NO_DRIVER | NOAHlink drivers not installed |
| 257 | NL_NO_DEVICE | No NOAHlink device present |
| 258 | NL_IN_USE | NOAHLink in use by other software |
| 65,535 | NL_UNEXPECTED | Unexpected error occurred |