Hey,guys, I meet problem with i2c library. I don't know what cause this problem. Does anyone have ever met it? I attach the problem with image
Please do us all a favour and post the code and error message here rather than a picture of it.
Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.
Thanks .. Tom... 
Picture does not show#include's and OP did not explain what library is being used. Waiting for updates.