I am using OTL in a 64 bit Delphi 10.2.3 app (haven't had to look at it for a while). I have updated OTL and I now get a ComObj can't be found error in DSIWin32. This is fixed by changing it to System.Win.ComObj.
One question, is DSIWin32 the correct unit to be used in a 64bit app?