You could try tweaking the session and form session state timeout values in
Central Admin (Office SharePoint Server Shared Services > Configure session
state AND InfoPath Forms Services > Configure InfoPath Forms Services).
Let us know if that helps.
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S.Y.M. Wong-A-Ton
> I have created a number of Infopath templates that submit to a SharePoint
> site. A few users are getting errors when submitting telling them to contact
> the administrator and only giving the options to 'Close' or 'Start Over' and
> therefore they lose all content.
> I suspect this may be due to having the templates open for too long?