Re: Failure on unarchiving a NSBezierPath

FROM : Jens Alfke
DATE : Thu Apr 24 21:20:19 2008

On 23 Apr '08, at 8:42 AM, an0 wrote:

> Nothing appeared when I opened a saved file, and log said:
> 2008-04-23 23:33:44.127 EasyDraw[631:10b] *** -[NSDocumentController
> localizedFailureReason]: unrecognized selector sent to instance
> 0x11b210


Something sent -localizedFailureReason: to an instance of 
NSDocumentController, apparently thinking it was an NSError*.
Given this method:

> - (NSData *)dataOfType:(NSString *)typeName error:(NSError **)outError
> {
>    return [NSKeyedArchiver archivedDataWithRootObject:view.drawing];
> }


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