We need to add a validation to add a base member in two Viewpoints (2trees) present in FCGL app.

we have two viewpoints (2 Trees) in FCGL app, one for primary hierarchy and another for alternate hierarchy. We need to have a validation in place that will make sure that any base member added in primary viewpoint has to be also added in alternate viewpoint.

The node type for both the viewpoints are same, but Hierarchy set and node set are different.

We tried using the location function in expression to identify the occurrence but its not recognizing the second occurrence in another viewpoint.

Appreciate your help if you have come across such scenario.