"InstallDatabaseInternalFailure: An internal error has occurred…" error when you install new databases in Skype for Business Server 2015

Applies to: Skype for Business Server 2015

Symptoms


In Microsoft Skype for Business Server 2015, when you try to install new databases by using the Topology Builder or by running the Install-CsDatabase cmdlet, you receive the following error message:
InstallDatabaseInternalFailure: An internal error has occurred while trying to create or update the database.
Error: Error executing batch.
Details: Error creating procedure DbpMaintainDatabaseIndices: sql error code = 137, error message = Must declare the scalar variable "@Maxdop"., line number = LineNumber sql error code = 137, error message = Must declare the scalar variable "@Maxdop"., line number = LineNumber sql error code = 137, error message = Must declare the scalar variable "@Maxdop"., line number = LineNumber sql error code = 137, error message = Must declare the scalar variable "@Maxdop"., line number = LineNumber

Resolution


To fix this issue, install the July 2019 cumulative update 6.0.9319.559 for Skype for Business Server 2015, Core Components.