Enterprise Search query giving FaultException when using an ORDER BY

By | 2010-11-12

Ran into this on a project when using the “FullTextSqlQuery” object to query against the Enterprise Search Service of SharePoint 2010.
Had a query that included an Order By clause on my own Managed property other than the normal RANK.

I kept getting an exception: “System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail]”

The problem was my Managed Property could not be used as an order by property.

Solution is easy to fix by PowerShell or the Central Admin:
Go to your Search Service application, click on through to the Managed Property you want to ORDER BY and check this box ON:
0458_sp2010-search-checkbox_0C75FD0C

The text actually says you need to disable the checkbox for order by to work, but it kind of works the other way around.
In powershell:

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