[O] taskjuggler subtract scheduled and deadline

[edgar]

Hello,

I am trying this:

#+BEGIN_SRC org
  ,* TODO Pay the rent                                     
:taskjuggler_project:
  SCHEDULED: <2017-12-29 Fri 09:00> DEADLINE: <2017-12-29 Fri 11:00>
#+END_SRC

which gives me this:
#+BEGIN_EXAMPLE
  repeat.tjp:13: Error: The end date (2017-12-29-00:00-+0000) must be 
after the start date (2017-12-29-00:00-+0000).
#+END_EXAMPLE

I tried modifying ox-taskjuggler.el:
#+BEGIN_SRC diff
  ,*** org/ox-taskjuggler.el    2017-12-26 16:39:52.633050180 -0700
  --- my/ox-taskjuggler.el      2017-12-26 19:42:17.921208465 -0700
  ,***************
  ,*** 478,484 ****
  --- 478,490 ----
    doesn't have any start date defined."
      (let ((scheduled (org-element-property :scheduled item)))
        (or
  +      ;; How do I compile a regex to avoid locale day names?:
  +      ;; "%Y-%02m-%02d [[:alpha:][:space:]]* %[RT]"
         (and scheduled (org-timestamp-format scheduled "%Y-%02m-%02d"))
  +      (and scheduled (org-timestamp-format scheduled "%Y-%02m-%02d 
%R"))
  +      (and scheduled (org-timestamp-format scheduled "%Y-%02m-%02d %a 
%R"))
  +      (and scheduled (org-timestamp-format scheduled "%Y-%02m-%02d 
%T"))
  +      (and scheduled (org-timestamp-format scheduled "%Y-%02m-%02d %a 
%T"))
         (and (memq 'start org-taskjuggler-valid-task-attributes)
        (org-element-property :START item)))))

  ,***************
  ,*** 487,493 ****
    ITEM is a headline.  Return value is a string or nil if ITEM
    doesn't have any end date defined."
      (let ((deadline (org-element-property :deadline item)))
  !     (and deadline (org-timestamp-format deadline "%Y-%02m-%02d"))))


    
  --- 493,506 ----
    ITEM is a headline.  Return value is a string or nil if ITEM
    doesn't have any end date defined."
      (let ((deadline (org-element-property :deadline item)))
  !     ;; How do I compile a regex to avoid locale day names?:
  !     ;; "%Y-%02m-%02d [[:alpha:][:space:]]* %[RT]"
  !     (or
  !      (and deadline (org-timestamp-format deadline "%Y-%02m-%02d"))
  !      (and deadline (org-timestamp-format deadline "%Y-%02m-%02d 
%R"))
  !      (and deadline (org-timestamp-format deadline "%Y-%02m-%02d %a 
%R"))
  !      (and deadline (org-timestamp-format deadline "%Y-%02m-%02d 
%T"))
  !      (and deadline (org-timestamp-format deadline "%Y-%02m-%02d %a 
%T")))))


    

#+END_SRC

but I got the same error. Is there a way to set starting and ending 
times with a resolution of hours or minutes to be exported with 
taskjuggler? Thanks!

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