I am using smart dnc 2015 but I don't know if that matters to the question. The question i have is that it was working fine until this morning when I went to send a program to my Mycenter 3x machine it normally would say waiting for maching then I go to the machine and start receiving and it would go. But this morning it just started sending and showed complete on the computer end but when you go to the mycenter 3x the program is not there. I don't understand why it would randomly stop working. Any ideas. Is there a setting in windows I need to check or something. I did restart my computer and once i opened my DNC software again all machines were gone and I had to manually add and configure them again