NPrinting is experiencing unusual behavior after an upgrade and you suspect that a restore was performed unnecessarily over the upgraded NPrinting installation using an older NP database version or you haverestored the wrong version of the NPrinting database to a Newly installed NPrinting Server.
Some of the symptoms of an unnecessary NP database restore or an invalid version database restore may be as follows:
Unable to log into the NPrinting Web Console
NPrinting Web Console may appear 'stuck' and does not response after logging in
NPrinting Scheduler. Engine and or License services may fail to start.
When logging into the web console, you may see an error as follows: "Error trying to open the page"
Can no longer access any pages such as connections, apps, reports etc. after logging into the web console
Accessing links in the Web Console is very slow
The License Page is repeatedly presented to you
Therefore you need to determine if an older database was restored over the existing/upgraded NPrinting server.
Environments:
All NPrinting 17 + platform server environments
NOTE:
It is NOT required to perform a NP database restore after an NPrinting Server Upgrade
The NPrinting upgrade process automatically updates all NPrinting database tables. It also adds or deletes any new or defunct NP database tables.
Diagnose:
Retrieve the NPrinting_Manager.log file from the customer found in "C:\ProgramData\nprinting\logs"
Search for a similar log entry as shown below:
"The database version {dbVersion} is different from the assembly version {assemblyVersion}"
Assembly version{assemblyVersion}: Installed version of NPrinting Database Version {dbVersion}: version of restored copy of NPrinting database
Sample log entry of a database version restore mismatch against a currently installed (assembly) version of NPrinting:
2019-11-13 07:41:27,236 [1] WARN Qlik.NPrinting.Manager.Commands.Restore.RestoreDbCommand - Qlik.NPrinting.Manager 19.40.0.0 Qlik.NPrinting.Manager.Commands.Restore.RestoreDbCommand 20191113T074127.236-08:00 WARN QLIKSERVER3 0 0 0 0 0 0 0 0
The database version 19.29.3.0 is different from the assembly version 19.40.0.0
If a similar message is found, then this confirms that there version mismatch
To resolve the mismatch, you will need to roll back to the previous assembly and database version of NPrinting
ie: Restore the pre-upgrade NP database to the pre-upgrade assembly version of NPrinting before attempting another upgrade.
What can cause this problem?
An NPrinting database is restored {dbVersion} that is older or newer than the current NPrinting {assemblyVersion} Database
