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AM335X COM CETK Test with FAIL Message in Result Log but the Test ID is PASSED

WinCE6 with CETK Test ID 11

When we execute the COM CETK test we found some weird message in the test id 11 result log.

BEGIN GROUP: SERDRVBVT.DLL
   <TESTCASE ID=11>
   *** vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
   *** TEST STARTING
   ***
   *** Test Name:      Send bytes at all supported bauds, data-bits, parity and stop-bits
   *** Test ID:        11
   *** Library Path:   \serdrvbvt.dll
   *** Command Line:   -p COM1:
   *** Kernel Mode:    No
   *** Random Seed:    26729
   *** Thread Count:   1
   *** vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
   BEGIN TEST: "Send bytes at all supported bauds, data-bits, parity and stop-bits", Threads=1, Seed=26729
      Send bytes at all supported bauds, data-bits, parity and stop-bits on COM1
      Calling GetCommProperties() on COM1
      COM1 does not support 110 baud
      Calling GetCommState() on COM1
      Calling GetCommTimeouts() on COM1
      WARNING in C:\yzqa\private\test\BaseOS\Drivers\Serial\BVT\serdrvbvt\.\testproc.cpp at line 221: GetCommTimeouts()
      WARNING!! :: WriteTotalTimeoutConstant in serial driver on COM1 == 0.....may create undesired hangs in system
      Setting WriteTotalTimeoutConstant to 100 so test will not hang
      Calling SetCommTimeouts() on COM1
      Calling SetCommState() on COM1
      Sending on COM1 at 300 baud, 5 data-bits, No parity, 1 stop-bits.
      Failed to send on COM1 at 300 baud, 5 data-bits, No parity, 1 stop-bits.
      FAIL in C:\yzqa\private\test\BaseOS\Drivers\Serial\BVT\serdrvbvt\.\testproc.cpp at line 286: WriteFile(); error 0

Even we the message show the

      Failed to send on COM1 at 300 baud, 5 data-bits, No parity, 2 stop-bits.
      FAIL in C:\yzqa\private\test\BaseOS\Drivers\Serial\BVT\serdrvbvt\.\testproc.cpp at line 286: WriteFile(); error 0

but the test result is still pass.

Does someone know what's going on about this message.