3rd Part DTM not in Device Definition
Is it Ver2.0 is supported for 800xA 4.1 , please double check, if yes, from which rollup onwards it supported, do you have all latest realesed rollups installed on your node?
Check for the release notes for upgradation of Metso DTM to Ver2.0.. Any specific prestaps to be followed before upgradation.. Still if you dont get, please rasie a support line case for this. It could be prodcut issue
can you please confirm what is the device revision of your device? V2.0 means whether you are mentioning the version of the object type? current version is V2.3. which supports device revison 02 device. For immediate reply on object types drop a mail to firstname.lastname@example.org.