The USB of TMX320F28377DPTP can't be wrote ?

When I debug the USB of F28377D, I can read out the file and data from the U-disk,but can't write to the U-disk.

FYI:

1) Engineering Sample Chip version:

|TMX320F28377DPTP    |

|             YFB-46AQ3HW   |

|                                  G4    |

2) controlSUITE version 3.3.0

The error msg:

USB debug loop in the function USBHCDPipeWrite(  ) and  can't receive the flag of ePipeStalled

            else if(g_sUSBHCD.psUSBOUTPipes[ui32PipeIdx].iState ==
                    ePipeStalled)

I doubt about this problem only happen on the Engineering Sample Chip or the example code?

any TI Employee can confirm this problem?