adobe dc print error code - what does it mean

hi everyone

got many machines in the school which are currently not allowing staff to print at present, all round adobe dc, the output printer is either Epson or rioch but that does not effect the fact that adobe will not print.

followed some of the items in this one

Adobe Reader DC - Unable to Print to any Printer on Domain

but I get

7509 : START: PDInitRasterEngine

7525 : END: PDInitRasterEngine

7540 : START: initAGMForPrinting

7556 : START: PDInitRasterEngine

7556 : END: PDInitRasterEngine

7572 : END: initAGMForPrinting

7572 : START: AVDocPrintCount

7587 : END: AVDocPrintCount

7587 : START: AVDlgDoPrint

7587 : START: PDInitRasterEngine

7587 : END: PDInitRasterEngine

7587 : START: OnFilePrintDoIt

7603 : START: OnPreparePrinting

7603 : Event: Not calling GrantSelfQueryAccessToProcess

7665 : START: PDInitRasterEngine

7665 : END: PDInitRasterEngine

7681 : START: DoPreparePrinting

7681 : Event: Not calling GrantSelfQueryAccessToProcess

10447 : END: DoPreparePrinting

10509 : END: OnPreparePrinting

10509 : START: DoGutsOfPrinting

10603 : START: PDPrintDocs

10962 : START: PrintSingleDocWinGDI

12020 : EVENT: AGMPrintInterfaceWinMin - StartDocAPIFailed

12020 : EVENT: PrintSingleDocWinGDI - Error Code - 1

12020 : END: PrintSingleDocWinGDI

14285 : END: PDPrintDocs

14332 : END: DoGutsOfPrinting

14348 : END: OnFilePrintDoIt

14364 : END: AVDlgDoPrint

can anyone give me in English why adobe is failing ?

thanks

andy