Conclusions from exchange of some private forum messages:
When using student version of Autodesk Robot Structural Analysis 2012 and the language of interface is set to Spanish it may be impossible to save the model - crash after selecting "Save as" command.
The interim workaround is to set the language of interface to English - using for instance Tools>Preferences in text menu.
I will update this topic as soon as any other news are available.
Best regards,
Pawel Pulak
Technical Account Specialist