Product(s): Bentley SewerGEMS, Bentley CivilStorm, Bentley StormCAD, Bentley SewerCAD Version(s): 08.11.xx.xx Environment: N\A Area: Modeling Problem When trying to open a StormCAD, SewerCAD, SewerGEMS or CivilStorm model, the following error message is generated: ArgumentException: Adding Duplicate The model will then not open. Solution This issue can occur if there is a problem with how the hydraulic model data is stored in the database file. There are a couple things that you can try. First, close the model but leave the program open. Go to Tools > Database Utilities. Browse to the database file associated with the model and select it. When prompted, choose the option to purge the database to save space. Then open the model and see if the issue still occurs. If it does, another option you can try is to restore a backup of the database file. You can find the steps to do that at this link: Can I restore a backup file of my model project? If that doesn't help or is not possible, please contact Bentley Technical Support for further assistance.
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