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Groupdocs Annotation

when default file powerpoint and exel show “Cannot open presentation.” Or “Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index” same image


But type .doc .png .jpg and whatever can open normal. how fix open type .xlsx and .pptx

code default my file name #img1#
.xlsx #img2#
.ppt #img3#
.docx #img4#

Chokpaisan S.
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  • Please, explain your case with more details. Also, it will be much better if you place your code inside your question instead of link to it on an external website. https://stackoverflow.com/help/how-to-ask – Igor Goyda Feb 28 '21 at 13:46
  • Try opening in Read Only Mode. Excel and Power Point often gives warning when attempting to open a file that is already opened by another user. Read Only Mode will eliminate the warning. – jdweng Feb 28 '21 at 13:53

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