The Solution Name is:

• a name assigned by Accusoft to the licenses purchased for runtime deployment.
• a character string that is set for a component prior to use in a deployment environment and is typically the name of the organization that purchased the runtime licenses.
• set via the SetSolutionName method of the component’s Licensing class. For example:

ScanFix sx = new ScanFix();
sx.License.SetSolutionName("ACMEImaging");

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