Thanks for your help ccs hello,
On the arduino dock connected 3 analog sensor, 1 digital sensor, and 3 pwm motor, no problem arduino program works fine.
When connect any I2C sensor on arduino dock first minute no problem(program running but i2c data no), program is locking later.
And if I connect I2C sensor on omega SDA SCL and check omega screen "i2cget -y 0 0x68 0x00" no problem reply 0xc2 vs..
if I connected I2c sensor different arduino uno or mega no problem works fine.

I used omega2+ with arduino dock. Few sensors connected on the digital and analog pins arduino dock and no problem good work. But i will try connect to dock i2c pressure sensor don't work. I read document omega, omega master i2c and arduino dock slave. How is possible i2c connect to arduino dock. Because sensor library on the arduino?