the sample code

addicon
{
if mouseover.BuffPresent() spell()
}

provides error message below

"type error parameter2 has not a valid in function buffpresent"

I'll relax the parameter format

"mouseover" is not a valid target. Ovale doesn't track that unit ID.

Ovale tracked it perfectly in 9.0.11 and prior. its tracked all valid UnitIDs
for the sample you can use "player", or "party1-4" result will be the same

I agree that it is a bug for the other unit IDs you have mentioned, but not for "mouseover" since that has never been tracked by Ovale.

Oh I see, engine/guid.ts doesn't track it, but a script was still able to call with an arbitrary unit ID and query the WoW server for the GUID of the unit on each frame refresh.

Oh I see, engine/guid.ts doesn't track it, but a script was still able to call with an arbitrary unit ID and query the WoW server for the GUID of the unit on each frame refresh.

and my scripts actively use mouseover, nameplateNN and other UnitID target parameters :) so I hope this functionality will be restored

@Sidoine How do you want to try to fix this one? The target check in states/conditions.ts restricts the allowed targets to a very small number of unit IDs (plus "cycle", which I haven't looked more closely at yet). Perhaps engine/guid.ts should export a VALID_UNITS table or an IsValidUnit() function that can be used instead? The only unit IDs that engine/guid.ts doesn't currently track are "mouseover" and "nameplateNN" for NN from 1 to 20.