Embeding Excel Docs in Word - Receiving Memory Error Message if Excel is open

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One of my employees is having problems embeding excel documents into a word doc. If she has excel documents open, she receives an error message that says she does not have enough memory to do this action. But, she has no problems embeding other types of documents if excel is open and she can embed an excel doc if she closes all open excel documents.

Is there a solution to this?

She is using Office 2013 on a Windows 7 (both are 64 bit).