Run Custom Actions with WiX 4.0.5 or 3.14.1?

[MatthiasRInst]

Hello,

Today I stumbled upon the bug submitted as #8078 , which results in WiX failing to start an impersonated Custom Action because of missing permissions on a temporary folder, showing the error message
SFXCA: Failed to create temp directory. Error code 5

I may not have fully understood the preconditions, but from my understanding the only precondition for this error to occur is that an MSI is started without elevation and there is a custom action running with impersonation. So this would affect every immediate-execution CA, doesn't it?

Is this true, or is there a way out without having to upgrade everything to WiX 5 now in a hurry?

Best regards

Matthias

[barnson]

You don't have to upgrade everything, just your custom action project.