Symptoms

Trying to activate a FlexiCapture Engine 12 license through the License Manager you can get the error This serial number cannot be used to activate ABBYY SDK 12:

Cause

The reason for such behavior is connected to the license protection type: the license uses online protection which does not require activation. 

Resolution

Please specify the appropriate license parameters during the initialization: ProjectId, license path and password.

For more information please refer to the FineReader Engine 12 Online Licensing article.