Git non fast forward?

I have problems every time I try to use git! I wish it were easy. I’m persevering because apparently it’s the next best thing.

So here is my error:

$ git push origin master
To git@git.assembla.com:ipumpt.git ! [rejected] master -> master (non-fast forward)
error: failed to push some refs to ‘git@git.assembla.com:ipumpt.git’

Can anyone tell me what’s going on here?

Try to pull from remote repository first, somebody pushed some changes that are not in your local repository.

I got same proble, and what Vitalie Lazu said make it solved.

Thanks!