This article describes the cause and possible solution for the error: STC Failure Occurred Mid Transfer (6, 'closehandle', 'the handle is invalid.')
This error typically appears when there is an issue with the ShadowSnap agent communications. This is a Python error that could signify a corrupted ShadowSnap install.
- Ensure that there are antivirus exceptions for the StorageCraft directories and services.
- Force a differential merge from the Advanced section under the Configure Agent Settings page.
- If the issue persists, reinstall the ShadowSnap agent by following the steps described in Using PsExec To Install The ShadowSnap Software.
- If backups continue to be unsuccessful, contact Datto Technical Support for further assistance.