Abambo, Thank you. My problem is not related to Kathleen's problem (different computers). Several days ago, when I tried to print two different PDF files, I received printing error messages stating that a particular file could not be opened. I failed to copy the error message (my mistake), but the file included the word private and one or two other words, followed by several numbers. Each printing error message had the same words but different numbers. I tried to print a different PDF file yesterday, and received the same error message (different numbers). So I deleted Acrobat Reader from my laptop and installed a new version of Acrobat Reader. I also uninstalled my printer from my laptop and reinstalled it. Now, when I try to print a PDF file, nothing happens after I hit the PRINT button. When I go to the print queue, there is nothing there. Note, I have no problems printing from other files; just PDF files from Adobe Reader. I have a MacBook Pro, macOS High Sierra version 10.13.2 (latest version). The Acrobat Reader is version 18.009.20050 (latest version, just updated). The printer is an HP OfficeJet Pro 8710. It is less than one year old. It is connected through WiFi.
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