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Troubleshooting STC failure occurred mid transfer. stcx.SnapshotError: Snapshot returned error code -87 for STC

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Scope

This article describes that cause and possible solutions for the error STC failure occurred mid transfer.  stcx.SnapshotError: Snapshot returned error code -87 for STC.

Cause

Solution

  • Make sure that any incompatible VSS-aware applications are not running on the protected server.
  • The following backup services are specifically known by Datto to cause Error Code -87 to populate:
    • Backup Agent
    • Backup Extender
    • Backup Updater

If these services are running on the production machine, disable them to prevent future conflicts.

 


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