Could not create new table alias

Hi all, 

I'm using Spotfire Analyst 11.4 LTS on Windows 10 (64-bit operating system, x64-based processor). In the information designer when I right click a table in our datbase to create a table alias (I need to perform a self-join), I get the following error: 

Error message: Could not add new table alias table_alias

InformationModelException at Spotfire.Dxp.Data:

An Internal Error has occurred.  (HRESULT: 80131500)

Stack Trace:

   at Spotfire.Dxp.Data.InformationModel.InternalInformationModelManager.AddTableAlias(String name, DataSourceTable table)

   at Spotfire.Dxp.Forms.Data.InformationDesigner.DesignerForm.AddTableAlias(CachedDataSourceTable table)

InformationModelServiceException at Spotfire.Dxp.Services:

An Internal Error has occurred.  (HRESULT: 80131509)

Stack Trace:

   at Spotfire.Dxp.Services.WcfSoapService`2.InvokeService[T](Func`1 serviceMethod, String customMethodNameForLogging)

   at Spotfire.Dxp.Data.InformationModel.InternalInformationModelManager.AddTableAlias(String name, DataSourceTable table)

 

One thing to note is that we recently upgraded from version 10.2 to 11.4 LTS. I used to be able to create table aliases when using the previous version, so I expect this error may have something to do with the upgrade.