Problem in Acessing files from sandbox

you can see this application on how to read/write file inside sandbox application:

//audio playback:

app runProc audioPlaybackRec audioPlaybackRecTest --exe=audioPlaybackRecTest – PB_SAMPLES MIC /usr/share/sounds/0-to-9.wav 1 8000 16

//audio recording

app runProc audioPlaybackRec audioPlaybackRecTest --exe=audioPlaybackRecTest – REC MIC /record/remote.wav WAV

you can also see this: