Using the @e selector in place of "<selector>" in the following:
/scoreboard players operation <targetName> <targetObjective> <operation> <selector> <objective>Will issue the "entity UUID provided is in an invalid format" error, so long as the selector is not targeting a player:
/scoreboard players operation @e OBJECTIVE += @e[type=!Player] OBJECTIVEEssentially meaning you cannot apply scoreboard operations against entities using another entity's score, which worked in previous snapshots. If replacing "<targetName>" with a selector capable of only targeting a player will work as expected:
/scoreboard players operation @p OBJECTIVE += @e[type=!Player] OBJECTIVEComments 12
I am standing directly in front of them and have them inserted into the scoreboard as a prep. What is the exact command set you're using? EDIT: very quick video example of it not working: https://www.youtube.com/watch?v=yOg8eW7hVas
Is this still an issue in the current Minecraft Snapshot 15w47c or later? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.
It is fixed in 15w47c. HOWEVER, if you type in an @ selector wrong, it will still add it as a player instead of complaining about the selector being in the wrong format.
For example, @e[tag=SomeTag] works as a selector while @e[tag="SomeTag"] acts as if you are inputting a player name. It should throw the usual "The entity UUID provided is in an invalid format".
I believe this is back in 1.11.2, but if @e[tag=something] finds a player it will work (only applying the operation on that player), but if it only finds other entities it won't. (tag=something could be anything inside those brackets, like score_objective=X)
It seems to work for me... You maybe didn't have any entities in the loaded chunks...