The Solution Key is

• A set of four numbers assigned when the licenses are purchased for runtime deployment.
• Identifies the organization that purchased the runtime licenses.
• Set via the SetSolutionKey method. For example: 

IsisXpress1.SetSolutionName("ACMEImaging");
IsisXpress1.SetSolutionKey(0x1C3A023F, 0xA018F260, 0x37AF0E51, 0x557F2389);

The Solution Key must be set in order to use runtime licensing.

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