Forum Post: RE: OpenPlant Modeler was unable to create a connection using the schema defined by the OPM_PRIMARY_SCHEMA configuration variable. The following exception was encountered:An item with the same key has already been added

Dear Kui Guo, Did you upgrade OpenPlant Modeler version? There is also a sign different path it might get stored. Please check the correct path it takes. You can also compare it with default projects path configuration. We need to look for whole setup here. May you please create Service request and upload your workspace? -Regards | Rahul Kumar