# OpenHistorian2 Error when connecting: "Server property is missing"

**URL:** <http://discussions.gridprotectionalliance.org/t/openhistorian2-error-when-connecting-server-property-is-missing/1361>\
**Category:** openPDC\
**Created:** [January 14, 2025, 9:29am UTC](http://discussions.gridprotectionalliance.org/t/openhistorian2-error-when-connecting-server-property-is-missing/1361 "2025-01-14T09:29:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![kitpm](http://discussions.gridprotectionalliance.org/letter_avatar_proxy/v4/letter/k/ecccb3/32.png) [@kitpm](http://discussions.gridprotectionalliance.org/u/kitpm)\
**Post date:** [January 14, 2025, 9:29am UTC](http://discussions.gridprotectionalliance.org/t/openhistorian2-error-when-connecting-server-property-is-missing/1361/1 "2025-01-14T09:29:18Z")

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PMU connection tester is getting a connection and receives data with a Siemens 7KE85.  
The Phasor Unit used to work with a previous installation of OpenHistorian2.

When I use the connection file in OpenHistorian2 Input Device wizard, we get  
ERROR: Connection attempt failed, request for configuration canceled: Server property is missing (Example: "Server=localhost:8888) in “;accessid=0;phasorprotocol=IeeeC37.118V1;”  
Failed to retrieve remote device configuration.  
I tried a few config changes, nothing helped. How do I repair this?

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**Author:** ![StephenCWills](http://discussions.gridprotectionalliance.org/user_avatar/discussions.gridprotectionalliance.org/stephencwills/32/20_2.png) [@StephenCWills](http://discussions.gridprotectionalliance.org/u/StephenCWills)\
**Post date:** [January 14, 2025, 4:21pm UTC](http://discussions.gridprotectionalliance.org/t/openhistorian2-error-when-connecting-server-property-is-missing/1361/2 "2025-01-14T16:21:47Z")

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Hello kitpm,

That connection string is indeed missing the `Server` property. If you know what endpoint you’re trying to connect to, you can simply add the missing property to your connection string. Maybe you can try using the connection string builder by clicking the little icon to the right of the connection string and use that to enter the IP address and port manually.

Thanks,  
Stephen

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<div class="post-metadata">

**Author:** ![kitpm](http://discussions.gridprotectionalliance.org/letter_avatar_proxy/v4/letter/k/ecccb3/32.png) [@kitpm](http://discussions.gridprotectionalliance.org/u/kitpm)\
**Post date:** [January 15, 2025, 7:10am UTC](http://discussions.gridprotectionalliance.org/t/openhistorian2-error-when-connecting-server-property-is-missing/1361/3 "2025-01-15T07:10:40Z")

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Thanks Stephen, that gave me the idea to solve it.  
I had to make the entire connection string.  
My workflow around this is to make the device in OH2 using the configuration file, then stop the device, add the connection string. After starting the device I get config frames and values. Still a bit weird, but workable. The default from the string builder worked, just enter your target IP address instead of 127.0.0.1.