Ally is a programmer's workbench and analyzer for AutoLISP. The Ally analyzer aids in debugging and documenting AutoLISP code by error checking, scoping and cross-referencing Lisp symbols - variables, constants, functions and subrs. Run from DOS or from within AutoCAD. The Ally AutoCAD interface requires AutoCAD Rel 9 or later, and a shell space of 240000 or more bytes.