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When trying to activate a PAK I get an activation error

Tekla Structural Designer - Not version-specific Tekla Tedds - Not version-specific Tekla Tedds for Word - Not version-specific
Environment
Not environment-specific

When trying to activate a PAK I get an activation error - "Server execution failed" - how do I fix this?

Image
Tekla-license-server-manager-server-execution-failed.png

Resolution

The License Service requires .Net 4 or later to be installed and working correctly

For Windows 8, 8.1 and Windows Server 2012 .Net 4.5.1 comes as part of the operating system and would just need to be enabled via the "Turn Windows features on or off"
 

Image
Tekla-license-server-manager-server-execution-failed-2.png

For earlier version of Windows this is a separate download from Microsoft website.

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