Hi, I have a strange problem. I have some Nintex workflow, which work, but after a few days, if I try to start them, they always fail on start and I receive a message, that the workflow was cancelled by the system account. If I open the workflow, republish it without changing anything, it works again for a few days. This happens only on some workflows, but periodically. I am using Sharepoint 2013 with Nintext Workflow 2013 Standard.
Does anybody has some ideas?