Ticker name starting with is not Saved by Amibroker

Hello Expert,
I am facing a peculiar problem with Amibroker 6.20.1 (32 bit). Any ticker starting with the letter V is not saved by Amibroker. When I import data, all tickers starting from A to Z (including V) shows data in candle stick. If i save the database after importing, it still shows all tickers (including V). But when I close amibroker and rerun again, ticker starting with V does not show up any chart (bar, line, or candle stick etc) rather it shows 'not enough data available', to plot any chart you need at least 3 data bar.

Can you help me out?

Thanks in advance.

You apparently deleted the "V" folder from the database. Databases MUST have A-Z folders inside. You can check and recreate. More on this: http://www.amibroker.com/guide/h_workspace.html

Great. thanks. Yes, I found that V folder is deleted from the database file.