Hi, I was writing a SFC to control a valve open/close, there are some bugs in the SFC so my valve had an error on the faceplate "Failed close" and Fail alarm says "Close confirm time", the error was "Undefined". I tried to acknowledge the error but couldn't. I searched around online, seems the problem may be I have two modules trying to control the valve that may have caused confusion and the error became undefined. Can anyone help clear the error? I checked the valve and it works fine opening or closing, just the error can not be cleared. Thanks in advance for your help.