This issue happens because the file in the Network Share is locked by another process while the scheduled indexing is running.
If you are running a scheduled index at the same time from two Enforce servers you will likely encounter this issue. It is not recommended to index a Network Share at the same scheduled time by more than one Enforce server such as a Production and Test Enforce Servers as this would cause timeout issues before each can complete the indexing successfully.
You should therefore run the indexing at separate times or on only one Enforce Server at a time so neither of the Enforce Server's scheduled start-to-completion time affects the other Enforce Server.
In addition you might encounter this issue if another application such as an Anti-Virus or Backup software is scanning the file being indexed at the same time. In which case you should either create a scan exclusion or change the schedules so neither overlaps to cause a deadlock on the file being indexed.
Imported Document ID: TECH221423
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