Nintex Observer

Call web Service - Failed to invoke web service

We have workflow running on a document library in SP 2013.


Most of the time workflow executes fine. However, once in a while we get an error in one particular action which calls the web service.

The error is:

Failed to invoke web service. Error returned from server: The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel.


The action is configure as shown below:


WF Error.png


The only strange part is the error is completely random. It does not happend for any specific user or scenario. 

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1 Reply
Automation Master
Automation Master

Re: Call web Service - Failed to invoke web service

Hi imran,


any chance you can check sharepoints ULS logs at the time the error occurs? Could be some infrastructure issue.

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