I hope someone can point me in the right direction. Sometimes a user gets one of the attached error messages when either calling a webservice of exporting a payment file. The last one is standard Dutch NAV functionality, so no customizations.

It is also not a consequent message, since the user performs these tasks multiple times a day and the message does not appear always. Also when the user tries it a second time it performs the functionality, or the user has to restart NAV and then it works again. Really weird.

Until now we only have 2 users that have this problem, but the DotNet objects are run on the server, so I do not think it is related to the PC's of those users.

I hope someone has experienced this issue before, but google is not really helpful in giving me a solution.

We are running NAV 2016.