If your problem is related to downloading data from your freefall logger, please read the documentation and any troubleshooting tips for your logger provided by the manufacturer first. Make sure communication is set up properly and any required drivers are installed. Bear in mind that not every device is compatible with every computer and that USB-cables and -ports might be broken.
Select the virtual COM-Port provided by the units adapter/driver as the 'Source' for downloading from the device in Paralog
On some machines, assigning a COM port of 10 or greater to your USB-Serial adapter prevents proper downloads. In this case, change the COM port assigned to your adapter to a port below 10.
On Linux you need to manually enter the port used (usually /dev/ttyS0 for serial connections, /dev/ttyUSB0 for USB connections). Make sure you have the proper rights to access the port; usually you need to be a memebr of the 'dialout' group.
Answers to other frequently asked questions can be found in the FAQ.
If the above hints did not solve your problem, please follow these steps to report a problem: