vsto - Getting error when adding programmatically a custom smartart shape in PowerPoint -

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i created 3 smartart shapes, , put them folder: "c:\users...\appdata\roaming\microsoft\templates\smartart graphics", , powerpoint load them successfully. can call them ui, if @ beginning once powerpoint opened, , add smartart shape slide programmatically, following error:

"the index specified collection out of bounds"

however if add smartart shape ui first, there no error if want add smartart shape code after that.

my smartart shapes: smartart resources

my code is:

 microsoft.office.core.smartartlayout mylayout = null; try  {        mylayout = powerpointapp.smartartlayouts["smartartabs3"]; } catch (exception ex) {         messagebox.show(ex.message);         questionlayout = null; }                  if (questionlayout != null) {         powerpoint.shape smshape = allshapes.addsmartart(mylayout, left, top, width, height);  //.....  }

note: using vs ultimate 2013, powerpoint 2013, c#, add-in-express

pretty sure cannot use name index must use index (long)

if don't know loop through names till find match find it.


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