I am using blpapi 3.5.5. windows python api. I am getting intraday tick data using //blp/refdata, following fields: BEST_BID, BEST_ASK and TRADE. Using Bloomberg terminal I found fields: IN_AUCTION, AUCTION_TYPE and TRADE_STATUS, but none of it works, returning NotFoundException.
Dou you know any field that is containing stock info (e.g. in auction/continiuos trading) available in  //blp/refdata?
Those fields are not available for all securities.
For example IN_AUCTION returns a value for VOD LN Equity but not for IBM US Equity. HELP HELP may be able to explain why.
So you need to add some logic and check for the exception.
Bloomberg API /blp/refdata: stockinfo