#1  
Old 22nd December 2014, 07:45 PM
magosk magosk is offline
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Join Date: Nov 2010
Posts: 24
Default Lost communication with network server

Hi,

we have a service developed with Visual Studio 2013, C# for .NET 4.0, using the NexusDB ADOProvider dated 2011-12-30, running against nxServer 3.1203. This service basically runs a query every five seconds. One of our support technicians installed this at a customer system, running Win 2008 Server, but were not able to get it running properly. Other services developed in Delphi worked properly against the same database. Each query attempt generated the following exception:

Code:
Exception with message 'Error: Error: NexusDB: <unnamed TnxQuery instance>: Lost communication with network server. [$2C0C/11276]'
We do not recognize this from our own setup tests. Before we had properly set up the connector, we could in our server environment (also 2008 server) get:

Code:
InvalidOperationException with message 'Connection must valid and open'
or when the ADO.NET connector transport was not active in the server we got:
Code:
Exception with message 'Couldn't (re)connect to the server: 
No connection could be made because the target machine actively refused it 127.0.0.1:16080'
Unfortunately we have no remote access to the system, we have to solve this over the phone the next time our technician visits the customer site. Any ideas of what might be wrong is much appreciated.

Regards

Magnus Oskarsson
  #2  
Old 23rd December 2014, 01:27 AM
Eivind Bakkestuen [NDD]
 
Posts: n/a
Default Re: Lost communication with network server

> --------------------
> Exception with message 'Error: Error: NexusDB: <unnamed TnxQuery
> instance>: Lost communication with network server. [$2C0C/11276]'
> --------------------


I'd be looking at anything that might interfere with tcp/ip traffic
(firewall, antivirus, etc), to ensure they allow traffic on the port(s)
you are using.

--
Eivind Bakkestuen [NDD]


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