Hi Jonathan, thank you very much for your support! Now I understand why my solution doesn't work, I have used your suggestions and I applied its to the source code. Best regards, Denis -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html