| Error Number | Error |
| 1 | Operation was successful |
| 0 | Registration failed |
| -1 | Another transfer is in progress |
| -2 | Invalid member |
| -3 | Invalid castlib |
| -4 | Member type does not match export file type |
| -5 | Property invalid for file type or invalid file path |
| -6 | User did not grant permission for this transfer |
| -7 | Memory allocation error |
| -8 | Could not create/open a temp file |
| -9 | File not found |
| -10 | File cannot be read |
| -11 | Sound sample rate or depth not supported |
| -12 | Out of memory |
| -15 | Unspecified error. The most common situation to cause this is no internet connection. |