Recently I got an error while converting from .tiff to .eps (Ubuntu 16.04 machine). This error happened for other file formats also.
convert:not authorized `fileName.tif` @ error/constitute.c/ReadImage/***
convert:not authorized `fileName.pdf` @ error/constitute.c/ReadImage/***
convert:not authorized `fileName.png` @ error/constitute.c/ReadImage/***
A quick googling gave follwing solution.
Go to /etc/ImageMagic-c/
In this directory, edit the file policy.xml by using
sudo vi policy.xml
and edit the following lines.
<policy
domain="coder" rights="none" pattern="PS"
/>
<policy
domain="coder" rights="read|write" pattern="EPS"
/>
<policy
domain="coder" rights="read|write" pattern="PDF"
/>
<policy
domain="coder" rights="read|write" pattern="TIF"
/>
<policy
domain="coder" rights="none" pattern="XPS"
/>
Note that I wanted to convert TIF file. So I added the line
<policy domain="coder" rights="read|write" pattern="TIF" />
So, by adding "read|write" in the rights option, it the ImageMagic convert will work now.
But, after doing your job, it is better to change to rights="none" because of the security issue (which the actual reason for disabling)
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