Error 0x003D0001

Value: 3997697 | 0x003D0001 | 3997697

What does it mean ?

WS_S_END  
There are no more messages available on the channel.
Value: 1 | 0x0001 | 0b0000000000000001

Where does it come from ?

FACILITY_WEBSERVICES  
Web Services
Value: 61 | 0x03D | 0b00111101

Other Errors for FACILITY_WEBSERVICES