General Network error. Check your network documentation.

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This is a proper netwrok error and has nothing to do with the coding if any of your jobs/queries/packages fail with this message.

Please refer the following article for the workaround.

https://support.microsoft.com/kb/942861/en-us

Another work around we tried and succeeded in our project was as follows:

There is something called Network Speed setting which is usually set to AUTO or a fixed value. You can check this from Start->Control Panel->Network Connections->Local Area Connection->Properties->Configure->Advanced->Speed &Duplex property. Change it to 100 MBPS full or whatever value that matches the configuration of the n/w port on the switch side. It solved the issue for us.