They says that you will not be allowed to appear for for interview in Cignex within 6 months of your last interview with them. But I have appeared 3 times in 2 months. First time I was rejected, 2nd time I was informed (after one round of face-to-face) that since I have appeared within six months of time, I'll not be allowed to continue with the profile. 3rd time when they came to know that I was serving the Notice Period of my current employer and will be released in next 10 days, they suddenly got overactive and completed my 1st round telephonic within 24hrs and processed my profile for client interview and completed all the process within next 1 week. So actually this 6 month thing works on case basis.