I'm getting 2 errors in Xcode Version 4.2 on an app that previously worked fine. It fails to build, but I can see the app in the simulator if I select Perform Action>Run Without Building, and it looks and runs good. Any ideas on what is causing this or how to correct? http://postimage.org/image/svtxj1ptv/

I'm thinking if you remove that '&' in the first error it should go away but I'm not sure it that will work. Any way you can show more code? (the entire method to be specific)

Removing the '&' didn't change it. Build Failed, shows !Semantic Issue BT_Core>BT_fileManager.m>+markFileAsDoNotBackup: /* The purpose of this method is to mark a file with a flag to tell iOS not to backup the file to iCloud. */ BOOL ret = FALSE; if(fileName != nil && [fileName length] > 1){ NSFileManager *fileManager = [NSFileManager defaultManager]; BOOL success = [fileManager fileExistsAtPath:[self getFilePath:fileName]]; if(success){ //get URL to this file.... NSURL *fileURL = [NSURL fileURLWithPath:[self getFilePath:fileName]]; const char* filePath = [[fileURL path] fileSystemRepresentation]; const char* attrName = "com.apple.MobileBackup"; if (&NSURLIsExcludedFromBackupKey == nil) { // iOS 5.0.1 and lower u_int8_t attrValue = 1; ret = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0); ret = TRUE; //[BT_debugger showIt:self:[NSString stringWithFormat:@"markFileAsDoNotBackup: SUCCESS: %i", result]]; } else { // get rid of extended attribute if it exists already... int result = getxattr(filePath, attrName, NULL, sizeof(u_int8_t), 0, 0); if (result != -1) { int removeResult = removexattr(filePath, attrName, 0); if (removeResult == 0) { NSLog(@"Removed extended attribute on file %@", fileURL); } } NSError *error = nil; BOOL success = [fileURL setResourceValue:[NSNumber numberWithBool:YES] forKey:NSURLIsExcludedFromBackupKey error:nil]; if(!success){ [BT_debugger showIt:self:[NSString stringWithFormat:@"markFileAsDoNotBackup: ERROR excluding: %@ from backup: %@", [fileURL lastPathComponent], error]]; ret = FALSE; }else{ ret = TRUE; } } /* NSError *error = nil; BOOL success = [fileURL setResourceValue: [NSNumber numberWithBool:YES] forKey: NSURLIsExcludedFromBackupKey error: &error]; if(!success){ [BT_debugger showIt:self:[NSString stringWithFormat:@"markFileAsDoNotBackup: ERROR excluding: %@ from backup: %@", [fileURL lastPathComponent], error]]; } */ }else{ [BT_debugger showIt:self:[NSString stringWithFormat:@"markFileAsDoNotBackup ERROR, file does not exist: %@", fileName]]; } } //return... return ret; }

An older file builds ok, but any new source code shows this error.

Hi Shenry, I think you might have a similar problem to what we've discussed in another thread (https://www.buzztouch.com/forum/thread.php?tid=CE03439B30F38253D4CEA99&fid=06DB0BCB08E2222&sortColumn=FT.id&sortUpDown=DESC&currentPage=1). If you XCode 4.2 can I assume you've got OSX Snow Leopard and iOS SDK 5.0? My build errors stopped when I upgraded to iOS SDK 6.0 but I still have the error when I launch the app in the iPhone simulator.