Hi thanks for the feedback.

Actually Zorro writes regularly to the .trd file :

"Stopping and resuming a live trading system
While trading, Zorro stores the currently open trades, the status of the sliders, and component specific variables (AlgoVar) in a .trd file in the Data folder. This way trading can be stopped and resumed without losing track of open trades. The name of the file is composed from the script name plus the selected asset plus a "_d" in case of a demo account. If a trade can not be resumed - for instance when it was externally closed - an error message will be printed at restarting the trading session, and Zorro will resume the other trades. Because any new trade overwrites the .trd file, its previous content is stored in a .bak file at session start. Trades are not resumed when the session has no lookback period and opens trades already in the first run."

This prevents the loss of data, even when you have a crash. This was working for me for years. I switched a while a go to Zorro64. I guess it was working as well, but now I have a modular set-up with several include files and therefore it hits all strategies and I have difficulties to find out the core issue.
Also the back up of the .trd file does not work anymore.

my version Zorro 2.70