What should I do if I close the application while it is exchanging data with the computer or with the devices in the Access Control System?

If the application is closed incorrectly, it may not correctly close the communication port that was being used, thus blocking subsequent communication operations through that port. In this case, close any applications running on the mobile device or cell phone and reset the device. This procedure depends on the mobile devices or cell phones used, but it will be described in their user manuals. In the case of Compaq iPAQ devices, simply turn off the device, insert the pen into the small hole at the bottom of the device and wait until it comes back on.