This is probably known but i couldn't find it in the search and was probably not searching for the right thing but. When trying to connect to a PLC, usually remote thru the internet, I get something wrong in the ip address or i didn't index the 28784 number in advanced. First the Comms window locks up. Then you alt-cntrl-del close the window. Then it just dings at you in the dmd program, again alt-cntrl-del and reopen.
Now i know if i didn't put the wrong ip address in or forget to index the port number this wouldn't happen but i'm getting up there and the mind suffers.
This is obviously not the end of the world just if it has slipped by i wanted to bring to your attention.