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On Saving workbook exception - Item has already been added

Hi Team,

I am getting an error which is very similar to this thread:


In that post the user complained that it only affected his debugging.

In my case it is affecting the production servers - normal running (not debugging alone).

So mine is more serious.

Aspose version

The stacktrace is as follows:

Source: Aspose.Cells Item has already been added.

Key in dictionary: ‘file:///C:\Users\Public\Symbols\BK.bmp’

Key being added: ‘file:///C:\Users\Public\Symbols\BK.bmp’

Stack Trace:

at Aspose.Cells.Workbook.Save(String fileName, SaveOptions saveOptions)

at Aspose.Cells.Workbook.Save(String fileName, SaveFormat saveFormat)

at xxxSummary.xxxSummaryCheckOut.xxxSummaryCheckOut(xxxSummaryQueue xxxSummaryQueue)

in C:\Projects\xxx\Class Libraries\xxxSummary\xxSummaryCheckOut.vb:line 976

Notice that the exception is thrown while saving the Workbook object !

Any help?


In latest version v7.1.1 we resolved similar issue, so, we recommend you to kindly try this version:

If you still find any issue using the latest version v7.1.1, please provide us complete details, screen shots, sample application etc. We will check it soon.

Thank you.


I found the root cause of this issue. One of the users had copy pasted a small bmp file multiple times. [BK.bmp].

Still - it might help you in recreating.



It’s good to know, your problem is sorted out. If you get any other question, please feel free to ask, we will help you asap.