NSE Inida has changed the history data file format recently. It was not a major change but Chartoasis.com's free stock analizer software was not prepared to load these files by default. We have corrected the problem on 2011-12-11.
Hopefully users from India will find a great use of our chart application for a long time
Please do not hesitate to contact us in case of problems related to the chart application. Thanks to a user email we detected the change of file format a lot earlier!
We also updated our help document for downloading market date from NSEIndia.com.