RadiMation Error: 805306668

RS232: Invalid Communication Handle

While a RS232 port was accessed an invalid handle was or is used. This could indicate that a port is trying to be opened which is not present (any more).

Solution

• Ensure that no other program is using the same COM port
• For USB <=> RS232 devices: Ensure that the device is connected to an USB port, and that the device is powered on.

A serial communication system, often used to control small equipment connected to a PC.

Universal Serial Bus: A modern serially controlled communication system, found on all new PC's