PDF could not be saved. It may be open in another application

[Adm 0]

PDF file could not be saved after inserting files and the message pops up as "PDF could not be saved. It may be open in another application"

Edited December 31, 2019 by Adm
typo

[AllainU 0]

Hello @Adm,

Thank you for reaching out to us through our Community Forums!

In order for me to further assist you with your concern, could you please provide the following?:
-The serial number of your Nitro Pro. To send it via private message, hover your mouse on top of my name 'AllainU' and select 'Message'. This matters because our business installers are different from the online ones.
-Build of Nitro Pro are you working with. You can find this out by clicking on 'About Nitro Pro' under the Help tab (format is 13.X.X.X, e.g. 13.2.3.26) or you can go to Control Panel > Programs and Features.
-Does this happen with every file? If it is a single file, please send us the sample file (with sensitive information extracted) by sending me a private message so I can replicate it on my end. 
-Where are the files saved (local, a shared drive or an external drive) when you are trying to inserting? Can you check if you have the same issue when the file is saved locally?

Thank you very much in advance and I am looking forward to hearing back from you.