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Small and medium business | Business Central, N...
Suggested Answer

Calculate VAT - error message : Server is not available / connection is lost

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ReportReport
Posted on by 10
Hello, we are running the Report - Calculate and post VAT declaration in our Navision2013R2
 
After launching it, around 12mins, we receive the error message - Server <xxxxxxxxx> is not available / connection is lost ; do you want to reconnect ? 
 
We have tried to :
- restart the service NAV and launch again
- launch on our serveur directly instead of user's post;
- check timeout one NAS : MaxValue 
 
But this did not resolve the issue ; the error persist 
 
If someone can help please ? 
 
Thank you very much ! 
 
I have the same question (0)
  • Suggested answer
    YUN ZHU Profile Picture
    99,055 Super User 2026 Season 1 on at
    Is this a standard report?
    Also, NAV2013 R2 has been out of support for over two years. Please upgrade to the latest version as soon as possible.
     
    Thanks
    ZHU
  • Suggested answer
    OussamaSabbouh Profile Picture
    12,803 Super User 2026 Season 1 on at
    Hello,
     
    Your NAV 2013 R2 VAT settlement report is simply running too long, and the NST drops the client session.
    It’s almost always caused by server timeouts or SQL load, not a bug.
    Increase NST timeout values and check SQL performance, or run the VAT calculation first and post it manually.
     
    Regards,
    Oussama Sabbouh

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