A long long time ago in a galaxy far away, a wonderful software company called IRIS released the LSX toolkit, allowing uber-nerds like me to extend the LotusScript language with C++ code. Stuff that was impossible to do in standerd script, such as AD pickers.
I've just had to fix a bug in one - 7 YEARS after I last touched it, and hit a particular snag.
When I tried to open the LSX Wizard, it'd come up with 'rror loading USE or USELSX module: *lsxwizard" in a dialog. About a million times. I'd re-import the REG file, and guess what - it still caused issues. LSX 3.1, LSX 8, Windows 7, Windows 8, Windows server 2012, Windows Server 2008, windows server 2003 64-bit .. All failed.
Why? Because MS had introduced this 'Wow6432Node' construct into the registry, so you needed to change the registry file to add this in after HKEY_LOCAL_MACHINE\Software.
I've spent tens of hours on this. And I'm putting this up here so I can find it again in another SEVEN years when I next debug this thing.