I think IGard has about 150...
I confess to starting out with a few more.
I have resorted to having characters only with primary races... the Republic, CIS, HUTTS, criminals...
I am actually preparing to test again in a couple of minutes... I have another question I want to put out though...
After doing a search through the forums, Erik confirmed that there was no limit on characters or character images. I saw where you were trying to assign characters to the non-playable races, and I'd be willing to bet that is what caused the issue.
No, I did not do that; I was warned not to, so I did not try that.
It is time to try the old tried and true method... add one character file at a time and see where it blows up.
Remember that the evil which is now in the world will become yet more powerful, and that it is not evil which conquers evil, but only love -- Olga Romanov.