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Solution Sage
Solution Sage

FIXED: Error: "Failed to read GatewayCore property: EnableFastCombine"

I was trying to refresh a report in the service that uses the Adobe Analytics connector and a on-prem database using the gateway, but kept getting this error:


Underlying error message: [Unable to combine data] <removed> references other queries or steps, so it may not directly access a data source. Please rebuild this data combination.


I have "Ignore the privacy levels" checked in my report settings, so I thought this was pretty strange.


I was also seeing this error in the on-prem data gateway logs:


Failed to read GatewayCore property: EnableFastCombine, Ex: Object reference not set to an instance of an object.


I found page, talking about adding something to the config file in the personal gateway:


Even though it says this fix is for personal gateway, I thought I'd try it--and it fixed the issue.



I added the following to "Microsoft.PowerBI.DataMovement.Pipeline.GatewayCore.dll.config":



<setting name="EnableFastCombine" serializeAs="String">




And now my reports are refreshing.

Solution Sage
Solution Sage

FYI this work-around is no longer working for me with the July 2019 version of the Gateway.

Solution Sage
Solution Sage

FYI, this change gets removed from "Microsoft.PowerBI.DataMovement.Pipeline.GatewayCore.dll.config" when a new verison of the gateway is installed and has to be reapplied.

Microsoft Employee
Microsoft Employee

Hi @jeffshieldsdev,

Thanks for your sharing.


Daniel He

Community Support Team _ Daniel He
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

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