[Resolved]  Indian Railways — how can CNF ticket become RAC

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Kerala

we had taken a waiting list ticket WL1 and 3 on[protected]. PNR [protected]. Till yesturday it was showing CNF and RAC1. today on date of journey we find that it as RA1 1 and RA1 3 what does it mean?. WHat type of system is this???. if it had shown both as RAC at least we could have done alternative arrangement. What is most surprising is that CNF which I think means CONFIRMED had become RAC when chart is prepared. How is this possible??? Any Answers???