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[hyperion]

Image Magick returns error numbers.  Activate debug mode to get the full error message.

Possible causes of IM error messages:

1. You have a space in the path to the IM Convert utility. You must not do this.   Windows users are advised to use a path without spaces, the short filename equivalent, or to set an IM environment variable and dispense with providing a path at all.
 
2. You have not set permissions for IM properly.  Remember that the server must be able to use IM.  Users of Windows IIS must give the I_ users (there are two) access the convert utility.

[kickme21]

For all you out there wanting to install imagemagick with windows IILs you have to change the security settings on the cmd file c:\windows\system32\cmd.exe

you need to allow read access for the internet users. IUSR_computername

that will sort out the Warning: exec() [function.exec]: Unable to
fork problem