When you try to start a backup for a system protected by the ShadowSnap agent, you receive the error message "[Errno 4] Interrupted function call."
- Datto ALTO
- Datto SIRIS
"[Errno 4] Interrupted function call" is a ShadowSnap error typically signifying an old or corrupted installation of ShadowSnap.
Figure 1: [Errno 4] error message
- Make sure the ShadowSnap agent meets all setup and compatibility requirements.
- Reinstall the ShadowSnap software using this article.
- In the device UI, force a differential merge.
- Take a new backup.
If the issue continues, contact Datto Technical Support.