I've read the manual a little more and found that "If the optional Label is included, this label will be jumped to if an acknowledge is not received from the IC2 device."

Maybe this can be the easiest solution? Something like using I2CREAD or I2CWRITE in a subroutine with a label, a little delay too maybe, and if read or write failed then jump back and try again the subroutine?

Any comment about this will be appreciated.

J-P