Legacy ImageMagick Discussions Archive

I was also using memory and map limits and set them lower than the defaults. It seems that was the cause of this. I removed the limits and haven't seen this problem again.

I installed the latest version without OpenMP Version: ImageMagick 6.9.1-10 Q16 x86_64 2015-07-31 http://www.imagemagick.org Copyright: Copyright (C) 1999-2015 ImageMagick Studio LLC License: http://www.imagemagick.org/script/license.php Features: Cipher DPC Delegates (built-in): bzlib djvu fftw ...

Thanks for the quick answer! Yes, I'm running Ubuntu Server 14.04 and ImageMagick version 6.9.1-6. I tried the merge command several times with the same images and the black line was only in some of the output files, so I can rule out the images as error source. I'll try installing the latest ...

I have images of all countries in the world. They have exactly the same size and are transparent except for the area with the country. I colorize the countries and then merge the images together to get one image that retains the transparency. The command I use for merging: convert -layers merge ...