In AKINSOFT Wolvox Programs, the quantity of computers defined for the license is registered with the machine names connected to the "Control Panel". 

In cases such as changes in the machine code of the connected computers or computer changes, it is assumed that more users than the number of licenses connect, and access to the program is prevented.

If these changes are taking place within your knowledge, you can log in to the program by operating from the control panel so that the new machine code is registered and the old code is deleted. 

The necessary operations are shown in detail in the screenshots below.

In whichever program (ERP, Human Resources, General Accounting, etc.) you face the received warning,  that program should be selected and customer definitions should be deleted.