Problem:

How to associate application to open DGN or DWG file created by AutoPIPE? 

Solution:

Use process Below. 

Step #1: Open folder where DGN / DWG file are located

Step #2: Right mouse click on the file and select "Properties", typically located at the bottom of the listing. 

Step #3: On the General tab, select "Change" button.

step #4: Select "Browse.." button or press on "More apps, scroll down to bottom, Look for another app on this PC" hyperlink

Step #5: Select "OpenPlantIsoExtractor.exe" application from folder location below:

C:\ Program Files (x86)\ Bentley\ OpenPlantIsometricsManager V8i\ OpenPlantIsometricsManager\ OpenPlantIsoExtractor

Press "Open" button

Step #6: Confirm "Always use the selected program to open this kind of file" was enabled (checked ON).

Step #7: Start AutoPIPE, Open model, Analyze model, Save as Stress Isometric, on the AutoPIPE Stress isometrics Manager Options, press "Settings" button, change Iso Viewer from "None" to "OPIM" as indicated below.

See Also

OPIM Stress Isometric Troubleshooting Guide

Bentley AutoPIPE