hi guys i am currently using above mentioned HMI in a project the problem is i couldn't communicate it with pc(i used usb interface) i am using gt designer2, i managed to download the program using my desktop pc and there was no problem in that, now that the panel has been transferred to the field i needed to make changes in hmi i used my laptop to communicate with it and that's where the problem started it displays the message communication error (80022.. i haven;'t remember the full number). i will really appreciate ur advices