ERRATA, Version 0.4 (4/14/97)

1. Faux pas: references to "Manin" should be changed to "Manev".  My apologies!

2. Error: output_joint_constraint sometimes returns no value.  Correction:
   change line 15681 of CODE:
   OLD (1 line):
          return true;    }    }
   NEW (2 lines):
          return true;    }
     return false;    }