problems with printers disappeared from system preferences

My printers were available and printing this morning and a few hours later that they were no longer available to print or to open even in the system preferences. I don't know what is happening. I have two printers of the air and a USB printer.  Neither appear regularly. Any suggestions?

I have the same problem on my Mac Mini 10.11.2. Last week I was printing to an Epson Artisan 730 and today he is more listed in the printer options. When I try to add to it begins set up printing it fills but never in the available printers. I checked that I can see through the web interface is available on my network. The App Store has no update for the printer (site solution Web Epson to the addition of the printer).

Someone at - it solutions to this problem?

Tags: Mac OS & System Software

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