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Historian 11.X will not read History Blocks from Previous Versions

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HOW TO

Description

 

Historian will not read older History Blocks.

Author

Mike Viteri

Publish Date 9/4/2014

Applies to Software

Historian

Applies to Version

11.X

Applies to System/Module

 

Article Version

00.00.01

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Detailed Steps 

 

After moving older History Blocks into a new Historian 11.x installation. The older History Blocks cannot be accessed for the data. This is because previous versions used the Classic Storage Subsystem. The Storage Subsystem changed in Historian 11. 

 

Resolution

 

 

Open your  Microsoft SQL Server Management Studio. Type in the following command in the against the runtime database and execute the query. You should have affected rows.

 

Update tag set AIHistory = 1 Where AIHistory = 0 and Tagname not like 'sys%'

 

 

 

Edit section

AIHistory.JPG

 

Now you will be able to query your older History Blocks for data.