We are getting this error on a machine that is running Windows 10. It is an HP Z600 workstation, has dual Xeon processors and 32Gb of RAM. Storyline is the only application running. Every time we get this error it is not possible to save the file (we are lucky to get a file recovery though).
This error only occurs with Storyline 3. When we check the memory availability, we have more than 28Gb free.