[1.7.10] Server Crashing

[GeneralSock]

I have a modded server, running on Ubuntu, for me and one other person. It works perfectly fine when we're in the spawn area, but when we move away the server crashes. In order to stop it crashing we have to quickly teleport back to the spawn area, otherwise it crashes every time we join. Here's my last crash report: http://pastebin.com/yaa4qu7b

[GeneralSock]

One of your mods is trying to access client-only code on the server. You have to remove mods one by one until you found the culprit.

 

Is there an easier way of finding out which mod it is?

[GeneralSock]

Ok. Thanks for your help.