Hi Sphin. Yes, sorry - I left out a few details...

This is in Trade. I don't recall which version I first noticed it, but it happened again in the current 1.74.

It appears that at Trade startup Zorro opens the (existing) log file, overwrites the initial startup messages at the beginning of the file, and then closes the file without truncating it to its new size. Subsequent Trade messages are appended to the file.

If that's what's going on, there seem to be 2 ways to fix Zorro:

1) Always open the log file for append (but this grows the log file indefinitely); or

2) Be sure to truncate the file when overwriting an existing log file (but this loses the old log data)

As a side note, I've also wondered why in Trade startup Zorro doesn't rename an existing log file so it isn't overwritten...

Thanks.