Megatest

								    (loop (car tal)(cdr tal)(+ rownum 1) 1))))))
						    (if (> max-row 0)
							(begin
							  ;; we are going to speculatively clear rows until we find a row that is already cleared
							  (let loop ((rownum  (+ max-row 1))
								     (colnum  0)
								     (deleted #f))
							    ;; (debug:print-info 0 "cleaning " rownum ":" colnum)
							    (let* ((next-row (if (eq? colnum 6) (+ rownum 1) rownum))
								   (next-col (if (eq? colnum 6) 1 (+ colnum 1)))
								   (mtrx-rc  (conc rownum ":" colnum))
								   (curr-val (iup:attribute steps-matrix mtrx-rc)))
							      ;; (debug:print-info 0 "cleaning " rownum ":" colnum " currval= " curr-val)
							      (if (and (string? curr-val)
								       (not (equal? curr-val "")))