[Bug 31599] Serif Photoplus X6 installer fails, reporting 'Invalid command line.' (registry command association for msi package, 'msiexec.exe' must be a fully qualified path)

https://bugs.winehq.org/show_bug.cgi?id=31599

--- Comment #6 from Anastasius Focht  ---
Hello Austin,

--- snip ---
"%11%\msiexec.exe /i %1"
--- snip ---

the package parameter needs to be double quoted since the path could contain
spaces.

--- snip ---
"%11%\msiexec.exe /i ""%1"""
--- snip ---

Interestingly I'm unable to pass more arguments using '%*' syntax.
Wine double quotes additional arguments, confusing the option parser but that's
another bug.

Regards