Historian Store/Forward initialization failure – Invalid file identifier (error 18)

Dear AVEVA Support Team,

We are facing a Store & Forward initialization error in our Historian system.

Error message:

Store/forward Storage (C:\Historian StoreForward\LocalAutoSummaryReplication) failed to load file

C:\Historian StoreForward\LocalAutoSummaryReplication\A000000001\taginfo.dat,

error = 18 (Invalid file identifier) fileid read requested returned 0 instead of 21587

[NEULANDUNIT1; HistoryBlockMetadataServer.cpp; 447]

Issue details:

• Historian version: [AVEVA Historian 2020]
• StoreForward path currently configured to: D:\Historian StoreForward\
• C: drive previously used for StoreForward; later changed to D: drive
• Error still references old C:\ path during startup
• Services affected: Historian Data Acquisition, Store & Forward
• Event Viewer logs show repeated initialization failure.

Actions already taken:

1. Verified StoreForward configuration path points to D:\
2. Checked folder permissions for Historian service account
3. Renamed and recreated LocalAutoSummaryReplication folder
4. Restarted Historian services and SQL Server services
5. Confirmed enough disk space on both C: and D: drives

Despite these steps, the same error continues to appear on startup.

Kindly advise on further diagnostic steps or confirm if internal StoreForward configuration or metadata cache reset is required.