I compressed the full US RNC set (6.5 GB) on a win10 box and it went through, but
- could be a case of 'pop-under' dialog boxes. Could you double check you it's not the case for you?
- dialog.hide doesn't seem to work
all the time !!
- adding some wxyield calls make it more responsive but it'd have side effects.
- IMO these dialog boxes called from dialog box aren't great UI.