You started Analytica with a model file specified on the command line, such as this:
and no such model file exists at that location.
When the path specified on the command line is a relative path, the path is interpreted relative to the working directory from where
Analytica.exe was launched.
Fix the path on the command line, or remove the extra parameter and just use File → Open after Analytica starts up.
If you encountered this error under different circumstances, please add your experiences here with information about how you fix them, for the benefit of other users who may experience the same.