Photoshop CS6 "Could not use the Quick Selection because of a program error"
I have a screen dump for your inspection. Contact firstname.lastname@example.org if you need further details.
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I would attach a copy of the file for your perusal if I could see how to do it. As extra info, the Quick Select opens showing a 'subtract' sign on the cursor not a 'plus'. If I go to use it, it will make a selection initially even though it shows a minus but then, without touching the 'alt' key, from then on will revert to subtracting the selection. Total nonsense.