"Could Not Load File or Assembly" error
Example of error on screen and in IPSError.log when logging in as Admin under an Idealpos 8.0 build on a machine where Idealpos 9.0 has previously been installed (a more recent example has "Version=9.0.0.5" in the error message) :
20240430 10:02:02.344 0h 55m 24s Support.GetTenantID on Line: 102 Error: -2146234304 - Could not load file or assembly 'IdealPosLicensingLocal, Version=9.0.0.1, Culture=neutral, PublicKeyToken=c5adf46cc9f0e6c6' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) -2146234304-Could not load file or assembly 'IdealPosLicensingLocal, Version=9.0.0.1, Culture=neutral, PublicKeyToken=c5adf46cc9f0e6c6' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Resolution :
Re-installing Idealpos 8.0 Framework and Build appears to resolve the problem (observed twice by author).