While generating Isometrics user is getting an error message Error[0]p; no DEF entry for Scalar Type DUMMYPIPE.This message can be seen when user has upgraded their Project.
Open Default Installation Directory of OpenPlant Isometrics.
Browse path (open any default project) C:\ProgramData\Bentley\OpenPlantIsometricsManager V8i\WorkSpace\Projects\OPModeler_Imperial\DataSet\Isometrics\Styles\Check\config.
Open symbolsizes.def file.
Copy below highlighted lines of Dummy Pipe.
Paste inside your working Project Isometrics Dataset.
Verify result. Launch Isometrics Session.
Regenerate Isometrics.NOTE: Symbolsize.def file is used for Scaling symbol of Components.