Data (cases) missing after synchronized

after completion of survey, Tab shown data synchronized successfully with server. But, when download the data file some cases are missing. I think data was not synchronized. How to identify those data or how do I get those cases? Please help me.


find the interview key in the interviewer actions log

then write to support with the name of the server, interviewer, questionnaire, interview key and the date it was synched.

Best, Sergiy