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Error in NSTask launch



I know it is something I am doinig but I am getting an error I can't seem to figure out. Here the code and then the error.

NSString *exePath = [[NSBundle bundleWithIdentifier:@"com.yourcompany.SetupDevice"] pathForResource:@"upnpsearch" ofType:@""];

	RunCommand *command = [[RunCommand alloc] initWithPath:exePath];
		// set up the args
	NSNumber *time = [NSNumber numberWithInt:15];
	NSString *destPath = [NSString stringWithString:@"/tmp"];
	
	NSArray *myArray = [NSArray arrayWithObjects: time, destPath, nil];
	[command setArgs:myArray];
	
	int result = [command execute];

Now in execute tI have the call:

[task launch];

I get the error:
2008-10-16 19:36:21.530 Installer[39330:813] *** -[NSCFNumber fileSystemRepresentation]: unrecognized selector sent to instance 0x3fbe9a20
(gdb) continue
2008-10-16 19:36:24.751 Installer[39330:813] *** -[NSCFNumber fileSystemRepresentation]: unrecognized selector sent to instance 0x3fbe9a20


Now I know this is on the arguments that I am passing in to the command line, but they look fine to em (Above in code) can anyone else see anything wrong?

Thanks,

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