Thanks. But it seems you haven't read to the end. As I said in my first mail:
> Besides, I found the value returned by [NSKeyedUnarchiver
> unarchiveObjectWithData:data] was nil, but I didn't understand why,
> since it was normal when I saved the file using [NSKeyedArchiver
> archivedDataWithRootObject:view.drawing].

On Fri, Apr 25, 2008 at 3:20 AM, Jens Alfke <[EMAIL PROTECTED]> wrote:
>  I suspect what happened is that NSKeyedArchiver returned nil for some
> reason, and the caller of that method then looked at *outError to find the
> reason for the error; but you didn't store anything in there, so it got
> whatever happened to be in that variable, which in this case may have been a
> pointer to the NSDocumentController.
>
>  So try adding a test for nil to your save method. It looks like that's
> where the problem is.
>
>  —Jens
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