If you have error 'No engines are working' you need to go to ADMIN in NPrinting tab and get ENGINE working in first place.
Your engine could stop workin due to many reasons:
DNS name of server was changed
Maybe ports are blocked
Check Engine service (whether it is running)
Maybe account for Engine service is locked
Start investigation from beginning by checking services, then accounts, then ports and then contacting network admins and making sure that server name is still the same
cheers Lech When applicable please mark the correct/appropriate replies as "solution" (you can mark up to 3 "solutions". This will help community members and Qlik Employees know which discussions have already been addressed and have a possible known solution. Please LIKE threads if the provided solution is helpful to the problem, but does not necessarily solve the indicated problem.