Issue

I mixed up my CANoe versions and receive different kind of error messages in ecu.test that I cannot resolve.

Solution

To get a clean registration of youe CANoe installation you have to reinstall/register the wanted CANoe version.

To re-register your CANoe search for the document AN-AND-1-117_CANalyzer_CANoe_as_a_COM_server.pdf.
which is located in installation directory (e.g. C:\Program Files\Vector CANoe 17\Doc).
Please take a look at chapter 1.4 COM Server Registration.