Assertation Failed??

> I've been changing a psd file but now when I try to save as web page I get
> the following message..
>
> "could not complete this operation because an assertion has failed"
>
> I couldn't find much about this beyond that the file may be corrupt or not
> in RGB format but this seems to apply to all my files.
>
> I have tried reinstalling the program but the message still occurs..
>
> Has anybody got any suggestions??
>
> Derek
>
>