From: Alessandro Mariani (
Date: Mon Dec 22 2014 - 20:04:41 CST

Hello, I'm currently using VMD 1.9.1 for mac and I never had any problem,
until two days ago when, with apparently non reasons, when I try to load
anything the graphic window freezes and this message is shown:

2014-12-21 20:13:22.692 vmd_MACOSXX86[5088:199173] Unable to simultaneously
satisfy constraints:


    <NSAutoresizingMaskLayoutConstraint:0x11b3ec00 h=--& v=--&

    <NSAutoresizingMaskLayoutConstraint:0x11b3e800 h=-&- v=-&-
V:|-(0)-[FI_TListScrollView:0x6d7630] (Names: '|':NSView:0x6d6570 )>,

    <NSAutoresizingMaskLayoutConstraint:0x11b3e7c0 h=-&- v=-&-
V:[FI_TListScrollView:0x6d7630]-(0)-| (Names: '|':NSView:0x6d6570 )>,

    <NSAutoresizingMaskLayoutConstraint:0x11b3a9d0 h=-&- v=-&-
V:[NSClipView:0x6d7bf0]-(15)-| (Names: '|':FI_TListScrollView:0x6d7630 )>,

    <NSAutoresizingMaskLayoutConstraint:0x11b3a990 h=-&- v=-&-
V:|-(0)-[NSClipView:0x6d7bf0] (Names: '|':FI_TListScrollView:0x6d7630 )>


Will attempt to recover by breaking constraint

<NSAutoresizingMaskLayoutConstraint:0x11b3a9d0 h=-&- v=-&-
V:[NSClipView:0x6d7bf0]-(15)-| (Names: '|':FI_TListScrollView:0x6d7630 )>

Set the NSUserDefault
NSConstraintBasedLayoutVisualizeMutuallyExclusiveConstraints to YES to have
-[NSWindow visualizeConstraints:] automatically called when this happens.
And/or, break on objc_exception_throw to catch this in the debugger.

What should I do?

Dr. Alessandro Mariani

PhD Student
Department of Chemistry
"La Sapienza" University of Rome
P.le Aldo Moro, 5
00185 Rome (IT)

Telephone: +39 06 49934082
Mobile Phone: +39 340 4124911