No, I have never been in the same situation as yourself.
Pinging/calling/emailing the visa office won't help. You must order GCMS notes. Someone you know who is a Canadian citizen or PR can order them on your behalf.... or you'll have to Google for an agent to order them for you
[/quote
Thanks for you advise Bryanna,I am going to do a GCMS , and I am worried about that I will be asked for an interview if the border officer think that my visa is issued fraud or misrepresentation .But I believe if the officer did think so , he would give me a40 instead of a42 . and there is no any doubt that I will be ask for an interview if i am on the per a40.