User needed to accomplish rounding to the nearest inch of the pipe length inside OpenPlant Isometrics Manager.
http://communities.bentley.com/products/plant/design___engineering/w/plant_design_and_engineering__wiki/13393.settingsattributes-openplant-isometrics-manager
http://communities.bentley.com/products/plant/design___engineering/w/plant_design_and_engineering__wiki/4351.openplant-isometrics-manager
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