Hi, the problem is that calc does not operate on regular elisp types but instead uses a different format: (float NUM EXP) for decimal floats. But ob-calc.el seems to simply push any value it gets on the stack and assigns it to a variable. And since calc treats anything which isn't in such a lisp form as an integer it tries to call idiv.
To fix this the value should be converted to calc format before `calc-push- list' is called. But after a quick look into calc.el I couldn't find any generic function to convert elisp values to calc values. The function `math- read-number' seems to be the only way and it requires a string. However my knowledge of calc internals is rather limited. Regards, Rüdiger On Tuesday 10 December 2013 10:43:02 Miguel Ruiz wrote: > Hi, > > Please, I am communicating the following problematic behaviour: > > #------------------- problematic code ------------------------ > #+begin_src calc > > sqrt(0.8) > #+end_src > > #+RESULTS: > : 0.894427191 # OK > > #+begin_src calc :var x=0.8 > sqrt(x) > #+end_src > > #+RESULTS: > =Debugger entered--Lisp error: (wrong-type-argument integer-or-marker-p > 0.80000000000000004) math-idivmod(0.80000000000000004 0.80000000000000004) > math-div(0.80000000000000004 0.80000000000000004) > math-cancel-common-factor(0.80000000000000004 0.80000000000000004) > math-simplify-sqrt() > #[(math-simplify-expr) "\300 \207" [math-simplify-sqrt] 1]((calcFunc-sqrt > 0.80000000000000004)) math-simplify-step((calcFunc-sqrt > 0.80000000000000004)) > math-simplify((calcFunc-sqrt 0.80000000000000004)) > calc-normalize-fancy((calcFunc-sqrt 0.80000000000000004)) > calc-normalize((calcFunc-sqrt 0.80000000000000004)) > math-evaluate-expr((calcFunc-sqrt 0.80000000000000004)) > #[(line) " > not copy-yank-able string > " > [line var-names calc-mode-map res x 0 calc-recall intern 1 "'" lookup-key > nil calc-push-list calc-eval math-read-number error "Calc error \"%s\" on > input \"%s\"" replace-regexp-in-string "" math-evaluate-expr mapcar > org-babel-calc-maybe-resolve-var math-read-exprs] 11] ("sqrt(x)")) > org-babel-execute:calc("sqrt(x)" ((:comments . "") (:shebang . "") (:cache > . "no") (:padline . "") (:noweb . "no") (:tangle . "no") (:exports . > "code") (:results . "replace") (:var x . 0.80000000000000004) (:session . > "none") (:hlines . "no") (:result-type . value) (:result-params "replace") > (:rowname-names) (:colname-names))) org-babel-execute-src-block(nil) > org-babel-execute-src-block-maybe() > org-babel-execute-maybe() > org-babel-execute-safely-maybe() > run-hook-with-args-until-success(org-babel-execute-safely-maybe) > org-ctrl-c-ctrl-c(nil) > call-interactively(org-ctrl-c-ctrl-c nil nil) > > > #---------------------- end of problematic code > -------------------------------- > > Command line: emacs -Q -l minimal-org.el > > ;;; minimal-org.el: > ;;; Minimal setup to load latest `org-mode' > > ;; activate debugging > (setq debug-on-error t > debug-on-signal nil > debug-on-quit nil) > > ;; add latest org-mode to load path > (add-to-list 'load-path (expand-file-name "~/org-mode/maint/lisp")) > (add-to-list 'load-path (expand-file-name "~/org-mode/maint/contrib/lisp" > t)) > > ;; active Babel languages > (org-babel-do-load-languages > 'org-babel-load-languages > '((calc . t))) > > ;;; end of minimal-org.el > > GNU Emacs 24.3.1 (i686-pc-cygwin) of 2013-08-14 on moufang > > Org-mode version 8.2.4 (release_8.2.4-3-g7fe99a @ > /home/usuario/org-mode/maint/lisp/) > > > TIA. > Miguel Ruiz.