Please help! My server is getting this error message whenever i try to turn it on! (FTB ULTIMATE)

So since sunday (Day before yesterday) my server has been malfunctioning with the same error message, right after it loads the "spawn area" or whatever. here's the error:

2013-11-26 08:01:53 [INFO] [Minecraft] Preparing start region for level 0
2013-11-26 08:01:54 [INFO] [Minecraft] Preparing spawn area: 26%
2013-11-26 08:01:55 [INFO] [Minecraft] Preparing spawn area: 51%
2013-11-26 08:01:56 [INFO] [STDOUT] Wrong location! pd['Pig'/132, l='world', x=289.97, y=64.00, z=343.03]
2013-11-26...

Please help! My server is getting this error message whenever i try to turn it on! (FTB ULTIMATE)