This article is for InventoryControl v5 or older. If InventoryControl v6 or newer gives this message, it is a different error condition and we will need their log files and backup.
In the Professional and Enterprise versions of InventoryControl, there is a problem if another application is already using the port that the License Manager wants to use. By default the License Manager uses port 10000. If this port is already being used the client machine may report this error message: Input string was not in a correct format.
To fix this problem, download and extract this file, then do the following:
ON THE SERVER
1) Run Change License Manager Port.bat to set the License Manager service to port 11,000.
ON THE CLIENT
1) Double click MobileInventoryPort11000.reg to update the registry to point to the new port number.