Bad Access Error

I have a game which runs fine in Unity Editor and Android mobile devices. But on iOS it pauses at splash screen. In Xcode console, the reports the following error.

FMOD::SystemI::createSoundInternal(char const*, unsigned int, unsigned int, unsigned int, FMOD_CREATESOUNDEXINFO*, FMOD::File*, bool, FMOD::SoundI*): Thread 1: EXC_BAD_ACCESS.

The Xcode project compiles with no error. In unity editor there's no warning or errors. Anyone who have an idea please lead me to the right direction. Thanks.