[ISS Support Case] Historian Client Not Displaying Recent Data : error = 33 (Invalid snapshot signature)

Last updated: October 17th, 2025

Description

Historian Clients are not displaying any current data. Stopped historian and restarted it. Rebooted the server. in SMC : "Main Storage exception caught: error = 33 (Invalid snapshot signature) file = E:\Historian\Data\Circular\A221103_001\original.dat..." (referencing the current history block for today) From historian client : Cannot fetch a row from OLE DB provider "INSQL" for linked server "INSQL". 2017 U3P01

Author: Kevin Modlin
Published: October 17th, 2025

Details:

Product: Historian Client

Version: 2017

Solution: [Solution is visible below when you're logged in and have a current subscription]

Date Created:	11/04/2022
Case:	83006

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