Occurrence:
The following error when attempting to open an existing project, or when creating a new project
IO error writing data file
An unexpected IO error occurred while writing the data file ***.lfdata.
The error was 'The request is not supported'.
Resolution:
If you are attempting to open or create a new project on a shared drive, try copying it to your local C:\ drive to see if that helps.
As a general rule of thumb:
The best thing you can do to make Leapfrog software run quickly and protect your projects from unwanted corruptions is to work on projects that are on your local hard drive. This is not to say that projects cannot be stored and transported on Network and USB drives, but these projects should be copied to a local working directory prior to opening, always.
Root Cause
This error commonly occurs when attempting to run Leapfrog applications on external drives or shared network drives.