You might be better off replaceing microcore.gz with tinycore.gz.
That is what I did to solve the problem
![Smiley :)](https://forum.tinycorelinux.net/Smileys/default/smiley.gif)
and start now with the boot option "text".
However, it seems not reasonable to me that ImageMagick.tcz does not install libjpeg, too (if missing). But maybe my understanding of microcore = tinycore - GUI is not correct.
Thanks a lot for your answers
Sigbert