Generate Iso only for selected pipeline in OPM CE

Hello all,

I have one single pipeline in my dgn-file which has references to other dgn-files which also contain pipeline. When I choose one pipeline in the pipeline manager and click the Generate Iso(s) button, the Isometrics Manager will Generate all Isos even in all files which are in references. How do I generate the iso only for the selected pipeline? I'm using OpenPlant CE Update 8.

BR

Tuomas