Thanks syphilis, but that is essentially what I did originally, only I used the default Image Magic install path (C:\Program Files\ImageMagick-7.1.1-Q16-HDRI), and the Image Magic install program put the pathname at the top of my system path. Is there something special about using a different install path (C:\d\ImageMagick...) rather than the default installation path?
"It's not how hard you work, it's how much you get done."