Great to hear that fixed the problem.
You should be able to record to a JLS file and then open the JLS file to view it. What exactly didn’t work for you? Does the JLS file exist? If so, what exactly happened when you tried to open it? It can take up to a minute to open large JLS v1 files.
Note that a 24-hour recording at the full sampling rate requires about 700 GB, so make sure your host computer has enough storage. You can reduce the sampling rate for less data. See Preferences → Device → setting → sampling_frequency. Many customers are happy with 10 kHz for longer recordings.
We also have a new JLS v2 file format that is much faster. The Joulescope UI does not yet record to JLS v2, but it can open and display them. To record, you need to use a python script, like capture.py with the
--jls 2 option.