You have recently upgraded Sage 300 and installed the new Avalara software for your new version, but an error appears and you cannot calculate or test the connection:
Error Code: 430
Class does not support Automation or does not support expected interface.
- You must install Avalara AvaTax for Sage 300 on every workstation in addition to the server after uninstalling the previous version.
- This error indicates the previous version was not uninstalled and/or the new version was not installed on the workstation
- Close Sage 300
- Uninstall the old version of the Avalara software using Program Manager/Uninstall Programs
- Install the new version