Hi there,
We have a Excel addin (XLA based) that works fine in Excel 2013 Desktop version. The problem comes if we try to open an Excel file created using our addin in Excel Online. Our addin adds an external link to a XLA file, adds multiple shapes to the Excel file and assigns shape's OnAction to one of the functions inside the linked XLA file. I investigated and found that Excel Online DOES NOT support External Links and Shapes so it warns the user with a message as below:
This is all as expected but if I set a Shape's OnAction to a function with a parameter such as Test.xla!ShowMsg("abc") and open in Excel Online then it fails with the following message and does not open the file. Is this a bug in Excel Online? Seems like it crashes and there is no message to open the document without Shapes or Links.