PS 2014 on my iMAC stopped printing suddenly after I had printed one image and tried to print another. I get the following error message, "There was an error opening your printer. Printing functions will not be available until you have selected a printer & reopened any documents." Editing function is PS are available, but I cannot print any images. I can print from Lightroom. I have the latest version of PS 2014 and I updated my printer driver & reset my preferences. I have never had this problem before and have been using PS for many years. Any suggestions?