ilkka.viinikanoja1.5524915723760881E12 asked a question.
Can't access 32-bit Registry item from a 64-bit installer
I'm having a problem with my 64-bit Basic MSI project. It's a package that needs to poll a Registry entry written by our other package (32-bit Basic MSI). The polling is done via an InstallScript custom action, and even though I run REGDB_OPTIONS = REGDB_OPTIONS & ~REGDB_OPTION_WOW64_64KEY; before my RegDBGetKeyValueEx query, I get the error code that FormatMessage translates to "The system cannot find the file specified", even though I've checked multiple times that the Registry key exists and the path is correct in my project apart from the Wow6432Node part (which should be handled by Windows). Or is it so that when querying 32-bit Registry from a 64-bit package, I'd need to hardcode the Wow6432Node into the path and REGDB_OPTIONS are not enough?
NvSize has been initialized and I tried this also with InstallShield 2013. The result was the same there as well.
I actually tried hard-coding Wow6432Node into the path I tried to use and that reached the correct value. However, for obvious reasons I wouldn't like to use that approach but keep the path as one single define and let the OS pick the correct branch according to REGDB_OPTIONS.