These issues might occur individually or together. They will finally result in OpenBuildings Designer not launching.For the SMC Error please follow the steps below:1. Reinstall the two highlighted files (see image below) from the Bentley Downloads folder.
2.Please try running the DataGroup Schema Upgrade Utility on the project's BB_Floormaster.dgnib file (do compress with all options on before closing the file to eliminate any unwanted content).Go to File>Utilities>Data Utilities and click on the Upgrade button to run the Schema Upgrade Utility.
For the .NET Framework error please follow the steps below :
Regarding the .NET Framework issue, please download and install the framework repair tool and during the installation keep OpenBuildings Designer closed. Then restart your machine after installation is complete. Please find the download link of Microsoft .NET Framework Repair Tool here.
1. CONNECT Edition - Installation Error - '.NET 4.5.2 '
2. Find/Replace Text is Generating a .NET Framework Error
3. .NET 3.5 Framework error message for AECOsim Building Designer on Windows 8 or 10
4. Upgrading a Dataset
5. Upgrade existing elements and their properties to the current DataGroup Schema