My project was designed in Linux Mint 17.3 and works very well.

However, attempting to run the same app in XP with MinGW 4.9.2, only one form outputs a warning, information, or an error???:

Qt Code: 
  1. Invalid source devmode on start
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The form is a QDialog which starts a Printer Dialog and-or a Print Preview Dialog.

The message occurs as the form is loaded before the first line of the constructor and not in any function after.

In every other respect, the form operates as expected.

I have no idea what this means nor where to look for an answer.
Is it worth pursuing or should I ignore it on Windows?
Has anyone encountered it before?

Help would be appreciated.