Hi All,

I am sending a NSURL, encoded as a Secure Bookmark, from the main part of my 
sandboxed application to an XPC Service that handles a specific subtask.  The 
data is making it across the interface, but when I try to resolve the bookmark 
back into an NSURL, I get the following error:

        10/24/12 5:15:18.908 PM com.einsteinslegacy.silica.silicaHelper: --- 
bookmark error: Error Domain=NSCocoaErrorDomain Code=259 "The file couldn’t be 
opened because it isn’t in the correct format." UserInfo=0x7faf418069a0 {}

Googling the text of the error message has not lead to any useful insights.

Here's what I'm doing:

•  When a user selects a file, I create an object containing the URL and the 
associated secure bookmark.  
•  I use NSKeyedArchive to create a data object, which I then pass to the XPC 
service as a key-value pair in an xpc_dictionary.  
•  The XPC service receives the message, unpacks it and calls NSKeyedUnarchiver 
to reconstitute the URL from the secure bookmark.  

At this point, I check the length of the bookmark data.  The value matches the 
length of the originally encoded bookmark.  However, when I try to resolve the 
URL using the following line of code, I get nil.

        self.url = [NSURL URLByResolvingBookmarkData: self.bookmark options: 
NSURLBookmarkResolutionWithSecurityScope relativeToURL: nil 
bookmarkDataIsStale: &isStale error: &bookmarkError];

The entitlements file used for the XPC Service is a duplicate of the main 
application file.  The XPCService dictionary in the service's info.plist has 
"JoinExistingSession" set to YES, so I assume that both parts should have the 
same set of entitlements.

Are there other factors I need to consider when passing secure bookmarks?

curiously,

douglas 
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