Hi, There is a dedicated section for NPrinting issues where you can post your queries. Regardless of this. please be aware that NPrinting 17.2 is already out of support, so I would suggest you install a newer version like NPrinting September 2019. Then, I would also suggest you to make your user ( svc_nprinting) a domain administrator and be added as an administrator of the server. Cheers!
Please, remember to mark the thread as solved once getting the correct answer
There is a huge list of feature, performance and stability improvements in the latest release so it should be a good practice to stay close to the latest! Note that Qlik releases new version 5 times a year so you can imagine how many versions behind you are!
more about other requirements and compatibilities:
If you want to install new version of 16.9 NPrinting you can just do it and copy across all relevant files.
If you want to migrate from 16 to any 17+ (17+ beeing any new version starting from 17.0 till September 2019) version then you need to understand that those 2 versions are essentially 2 different products which require migration steps and need to meet strict requirements. Not everything can be migrated. There are manual steps you will have to do. You will have to reconsider if all reports will be supported etc...
First of all make sure you read ALL requirements, deployment and upgrade instructions from https://help.qlik.com. I will not re-write the same thing here as there is a lot. installation and migration should be done by someone who has an experience and is knowledgeable in NPrinting. If you are new to NPrinting 17+ I strongly suggest you seek help in Qlik partner who will be able to consult you on this. 1 day will be enough and you will not be stuck with thousands of questions how to do things.