The following error codes are custom HRESULT values defined in DSKQUOTA.H. They are returned by the disk quota interfaces, along with some of the standard HRESULT values.
| Error | Meaning |
|---|---|
| DQC_E_ACCESS_DENIED | The caller has insufficient access rights. |
| DQC_E_BAD_PATHNAME | The requested path name is invalid. |
| DQC_E_FILE_NOT_FOUND | The specified user account cannot be located. |
| DQC_E_INITIALIZED | The object has already been initialized. Multiple initialization is not allowed. |
| DQC_E_INSUFFICIENT_BUFFER | There is insufficient memory to complete the operation. |
| DQC_E_INVALID_NAME | The requested file path is invalid. |
| DQC_E_INVALID_SID | The SID for the user is invalid. |
| DQC_E_LOCK_FAILED | Failure to obtain an exclusive lock. |
| DQC_E_NO_MORE_ITEMS | There are no more items in the enumeration. |
| DQC_E_NO_QUOTAS_FS | The file system does not support quotas. Currently, the file system must be NTFS. |
| DQC_E_NO_QUOTAS_FSVER | The file system version does not support quotas. Currently, the file system must be NTFS 5.0 or later. |
| DQC_E_NO_SID_MAPPING | There is no mapping available for the SID. |
| DQC_E_NOT_INITIALIZED | The object has not been initialized. Initialization must be completed before the operation can be performed. |
| DQC_E_NOT_SUPPORTED | The operation or capability is not supported. |
| DQC_E_PATH_NOT_FOUND | The requested file path was not found. |
| DQC_E_USER_HAS_FILES | The user owns files on the volume. |
| DQC_E_USER_UNKNOWN | The specified user is unknown. |