I can run venila minecraft servers but I can't run modded ones?

When i run my modded server it says reached end if stream on [ip], i used to be able to run minecraft servers and even on hamachi it won't work for modded ones, is my pc restricting me from running the modded ones or can i do something about it, please help its driving me insane, and my pc is very powerful sdo its not hardware, Its strange because i can run venila