Linux Error, FMOD_ERR_FORMAT:Unsupported file or audio format

I’m using Fmod Designer, an old version of FMOD Studio. There is so little information about FMOD Designer that I have to find the answer here.
I developed a c++ program on Linux to load fev files. But the error was reported when loading fev(when using eventsystem->load()). The fev file was built by Fmod Designer for PC(included linux platform).

ERRCHECK(result = FMOD::EventSystem_Create(&eventsystem));
ERRCHECK(result = eventsystem->getSystemObject(&fmodsystem));
ERRCHECK(result = fmodsystem->setOutput(FMOD_OUTPUTTYPE_NOSOUND));
ERRCHECK(result = eventsystem->init(64, FMOD_INIT_NORMAL, 0));
ERRCHECK(result = eventsystem->setMediaPath(path_new));
ERRCHECK(result = eventsystem->load(file_new, 0, &eventproject));
->FMOD error! FMOD_ERR_FORMAT. Unsupported file or audio format.

The log is when fev file be loaded:

MOD: EventSystemI::init             : maxchannels = 64.  flags = 00000000
FMOD: SystemI::init                  : FMOD Ex Version: 00042636
FMOD: SystemI::init                  : maxchannels = 64, flags = 00000000, extradriverdata = (nil)
FMOD: SystemI::close                 : 
FMOD: SystemI::close                 : Stop all sounds
FMOD: SystemI::close                 : Shut down output.
FMOD: SystemI::close                 : Remove miscllaneous DSP stuff.
FMOD: SystemI::close                 : done.

FMOD: OutputNoSound::init            : Initializing.
FMOD: OutputNoSound::init            : Done.
FMOD: SystemI::init                  : Set up software engine
FMOD: Thread::initThread             : Initializing FMOD mixer thread.  priority 3
FMOD: Thread::initThread             : - Stacksize 32768.  Stack pointer (nil) : usesemaphore = 0 :sleeptime = 10
FMOD: Thread::callback               : * FMOD mixer thread started
FMOD: Thread::initThread             : done.
FMOD: SystemI::init                  : Set up emulated output
FMOD: SystemI::init                  : create the channel pool
FMOD: SystemI::init                  : Set up streamer
FMOD: Thread::initThread             : Initializing FMOD stream thread.  priority 2
FMOD: Thread::initThread             : - Stacksize 49152.  Stack pointer (nil) : usesemaphore = 0 : sleeptime = 10
FMOD: Thread::callback               : * FMOD stream thread started
FMOD: Thread::initThread             : done.
FMOD: SystemI::init                  : done

FMOD: EventSystemI::init             : done
***************
FMOD: EventSystemI::load             : name_or_data sfx.fev
FMOD: EventSystemI::load             : FEV_MAGIC

Could you any please tell me the reason why?

Thank you so much!