My application communicates with PC by opening serial port over USB (opening port ACM::1). Everything works fine but there are _infrequent_ read errors such as -6710 or -6706. The code range points to USB however I have not found any description for these error codes. If anyone from Nokia reads it please help.

This occurs on S60 3.0 as well as S60 3.0 FP1 phones such as E61i, E71, E51