Uhhh.... You need to give a bit more info or if your minecraft crashed please post a crash report. I will review it and tell you what I think if you have one!
Um it never crashed it's just when I copy my world which is 1.2.5 to make into a server it deletes everything I have built.
How do I fix this problem my world in a 1.2.5 world and when I back it up or copy it to make it a server my house and every thing i have built is gone. I'm currently playing 1.3.2.
0
0
0
0
0
0
0
0
0
0
0
Um it never crashed it's just when I copy my world which is 1.2.5 to make into a server it deletes everything I have built.
0
0
0
0