PI Server software is not connecting with toolbox ST software in historian server. How to resolve the issue?

Hi, I am Sayed Tanzim Ishteaque, I work in a combined cycle power plant. In our power plant we use a historian server to store all data of the power plant. Specially the data about Gas turbine and Steam turbine. In the historian server computer, we use PI server software. But recently we notice that on the historian server monitor one massage is showing that says “Cannot connect to the PI server on the HIST_SVR. The AF server on HIST_SVR is running normally”. The image of the massage is given bellow:


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When we are extracting the message in the event viewer the detail massage is showing like the image bellow:


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We are using “PI System Management Tools 2012 SP1” as the server management software. in the historian server computer one software named “Toolbox ST-5.4” for GE, Mark Vie communicate with the PI Server Software. How can we resolve this issue?

 

We are using:

 

PI Server

File version: 1.4.0.0

Assembly version: 1.4.4.486

System Information:

CPU: Intel (R) Xeon (R) Cpu E5-2620 v3 @2.40 GHz

O/S: Microsoft Windows Server 2008 R2 Standard

O/S version: 6.1.7601 Service Pack 1 Build 7601