Solved Com port #4 in use!!!!!!!

Well I am sometimes S L O W when it comes to computer usage. I kept getting the title message when I tried to load Matter to run a print. The problem is that matter loads SO SLOW that I clicked on it again.. It would finally appear on the screen with the message. I got 'mad' and clicked the X in the upper right to delete it. I noticed that it immediately popped up again by itself and was ready. This human error problem was solved after a few simple reruns. Just a thought , hope it helps other slower ones on the computer. LOL Frank
PS, I never get mad, only disappointed and frustrated.