The following table lists the codes that are returned to the MS-DOS screen when command scripts fail.
| Decimal return code | Error | Meaning |
| 2114 | Server not started | The server has not initialized enough to handle remote procedure calls (RPCs). |
| 5 | ERROR_ACCESS_DENIED | The user is not an administrator. |
| 8 | ERROR_NOT_ENOUGH_MEMORY | The server could not allocate enough memory to handle the request. |
| 2222 | Object not found | The user tried to do something, and the object of the RPC could not be found. |
| 267 | ERROR_DIRECTORY | The directory is invalid. This error occurs when the user tries to set the properties of a newsgroup that does not exist. |
| 123 | ERROR_INVALID_NAME | This error occurs when the user tries to create a newsgroup with an invalid name. |
| 1359 | ERROR_INTERNAL_ERROR | The source of the error cannot be determined. |
| 2140 | ERROR_INTERNAL_ERROR | The source of the error cannot be determined. |
| 87 | ERROR_INVALID_PARAMETER | One of the parameters provided during the RPC was not accepted. |