If its the same error that means you are still over the limit.
ECX does allow you to add charactrs but there is a limit to what the 1.2.3 version of the gam,e modified with AMXX can handle.
And taht limit is 512. That means ALL player characters and all for their forms, along with all map models, all aura models, all transformation effect models must add ut to a number less than 512.
If you still got that error you still have to many models that need to be loaded into the game. And the only thing you can do is remove characters from the game untill you get below that limit.