Mach_Error 4 Occurring When Attempting Injection

[ELCHILEN0]

Hello,
I am trying to inject a bundle into a certain process. I have created a new Xcode Project which solely handles the injection. I added the necessary frameworks and project files to the app. And have also added an "injectee" bundle to the project. I feel that everything that I am doing is right however I keep occurring with the messages in the log:

mach_inject failing.. (os/kern) successful
mach inject done? 4
MyApp[34807:c07] Failure code 4

Here is my relevant code:

• (void)injectBundleWithPath:(NSString *)bundlePath intoProcess:(pid_t)pid
  {
  if ([bundlePath isAbsolutePath] == 0) {
  bundlePath = [[[[NSFileManager defaultManager] currentDirectoryPath] stringByAppendingPathComponent:bundlePath] stringByStandardizingPath];
  }
  mach_error_t err = mach_inject_bundle_pid([bundlePath fileSystemRepresentation], pid);
  if (err != err_none)
  NSLog(@"Failure code %x", err);
  }
• (void)injectBundle:(id)sender {
  NSString *bundlePath = [[NSBundle mainBundle]
  pathForResource:@"Injectee" ofType:@"bundle"];
  pid_t pid = GetPidByBundleIdentifier(@"com.bundle.identifier");
  [self injectBundleWithPath:bundlePath intoProcess:pid];
  }

I am not sure why this error is happening and was wondering if other users have experienced the same thing. Thanks.

[albertz]

You could step through mach_inject and see at what line it fails exactly.