tb- command passed along in the DB). Add check to make sure no mixed
use of types and classes since. Change solver invocation. Was trying
to use IPC goo to pipe in input to solver and read back results,
abd tee off the input file for debugging. That does not work cause the
tee never exits, and so the child never exits. Reorg slightly; write
the input file to a temp file and pipe in later. I need to kill off
the IPC goo though, since its no longer needed, but its harmless as it
is.