It is very frustrating when you cannot get into an instance and you get the message "Additional Instances cannot be Launched". I do not remember this occurring often pre WoTLK, however now I get it for instances from Stockades and SM to Nexus and HoL.
This trick I have been trying lately is for resetting the instance once you have gotten in. Many times I am doing instance runs of the same instance and it took a long time to get in because "Additional Instances cannot be Launched" and you will get the same message when you go out and reset to go back in.
What I have been doing is going out while the group stays in the instance, then resetting the instance. Now, as I run in the group runs out at the same time. Now I get in to the reset instance without getting stalled by the message of the instance being full. Then the rest of the group turns around and runs back in.
I have tried doing this with the group staying in as I run in, however it doesn't work and I get the message and can't get in. It only seems to work if I run in the same time the group runs out of the instance.
I am putting this all as a tentative exploit as I am in the middle of investigating it. All this information is from what I have discovered thus far.
Also, do not worry about when you are resetting it that it says it cannot be reset because group members are still in the instance. It will just make it so that when you go in it is like you are going into a different instance (a reset one) and the other members are still in the old (cleared) instance.
Thank you, and please let me know if you have any additional information or questions. :wave: