Problem in java

[PoloDude]

Hi, we developed a program, a so called mud (multi user dungon)

Kinda stupid and out of dated game but hey, school-project

We have a server and a client and when we try to add a new user to the db we get this error java.util.ConcurrentModificationException and the client runs block

Adding the user is performed in a thread.

Any idee how this can be solved?

[PoloDude]

problem solved

thx for the replies ...