after updating to X3 it seems there are non localizable messages.
Using single file build of a german translated project we get the following when starting the result:
I did a full search on the project folder and also the full(!) C:\Program Files (x86)\InstallAware
and could not find it.
actuallly this particular string is not part of the localized shared strings. Earlier versions of InstallAware produced a different message at this point "setup is verifying...2 which was part of the shared strings.
The Shred Strings contains four sections: Dialog text, Installation message, initialization text and Native engine.
the default sentence displayed by the initialization dialog is; "The InstallAware Wizard is verifying the contents of this setup package. This may take a moment."
initialization_dialog.png (208.85 KiB) Viewed 5732 times
I can only suppose that for some reasons, you used a custom and different string translation, which is not part of the default shared strings.