Not a solution, but an alternative. In the past I've done some animations by using Multiple-Photo-Rendering to generate a series of still images to be combined externally . If SH3D falls over I at least have all the images generated to the point of failure.

To make this easier I created a plugin that exports and imports camera locations:

https://sourceforge.net/p/sweethome3d/plug-ins/25/

The plugin can import more cameras than the SH3D would normally allow.

Because the import/export format is CSV I can easily write scripts or spreadsheets to generate sequences of camera locations.