Rich,
I apologize. I forgot that ghostscript uses an older versions of libnettle and libhogweed libraries.
Once I updated my system, the issue reappeared.
The executable, gs, uses libnettle.so.7 and libhogweed.so.5.
The 13th piCore repository extension nettle.tcz contains libnettle.so.8 and libhogweed.so.6.
As a work around, I copied nettle.tcz from the 11th piCore repository. That worked.
I don't know where else nettle.tcz extension is used, so I don't know how it or if it should be fixed for piCore 13.0 specifically.
Rich, I want to thank you and the Tiny Core Linux team for the work you do.
TinyCore, dCore, and piCore are outstanding Linux distributions. Absolutely love their architecture and memory footprint.
Most of all, I appreciate the way this forum works and the people who run it.
Thank you.
regards,
ctor