ERROR: function LockSemaphoreInfo, file magick/semaphore.c, line 525

Ron Lussier <[email protected]> Mon, 29 Mar 2010 10:06:08 -0700
Newsgroups gmane.comp.video.graphicsmagick.bugs
Message-ID <[email protected]>
When attempting to use the 'gm' command to convert a PNG to a JPG, I get the
following error:

Assertion failed: (semaphore_info != (SemaphoreInfo *) NULL), function
LockSemaphoreInfo, file magick/semaphore.c, line 525.

The command I'm using is:

   gm convert -resize "500x500>" -quality 85 horses.png horses-med.jpg

I get the same exact error with the simplified command:

     gm convert horses.png horses-med.jpg
or  gm convert horses.png horses-med.png

Conversions with other file types seem to work, but PNG conversions do not.
I'm trying this on a Mac with the latest OSX.  Is this a known bug?  Is
there a work-around?

'make check' also fails against the PNG images.  I've installed the Mac
build of libpng.

Help?

Ron

-- 
ron lussier / lenscraft                           fine art photography
[email protected]                              89 crescent avenue
AIM [email protected]                                 sausalito / ca 94965
http://www.lenscraft.com/                              +1 415.669-4766

"Ignorance breeds monsters to fill up the vacancies of the soul that
are unoccupied by the verities of knowledge." - Horace Mann

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