VBA excel macro generates "automation error" randomly using Office 365

I have a VBA macro for automatically create a word report using data in Access and Excel. The macro is hosted within a Excel document but are using both Word-, Excel and Access objects/dataTtemplates for the creation.

The errors appears what it seems randomly. The macro iterates the same code a few times even in Office 365 but then it craches. The most common error messages are:

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Error 1:

Run-time error '-2147417851 (80010105)':

Automation error
The server threw an exception.

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Error 2:

Run-time error '462':

The remote server machine does not exist or is unavailable

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Error 3:

This action cannot be completed because the application () is busy. Choose Switch To to activate and correct the problem.

(no options are working, this hang the application)

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If I debug usually the error orginates from the code where I ether close the workbook template I'm using:

excelWorkbook.Close False

... or when I paste a chart from Excel to the Word report:

wordDocument.ActiveWindow.Selection.PasteSpecial

Even more strange are that sometimes if I continue to run the macro its all working again. This ONLY happens when the client office installation is O365. Office 2013 works just fine. I thought O365 and Office 2013 was fairly equal?

Thanks in advance!

Not sure if this is the right forum for your problem as there is a forum for "Office 365" as well. If you get no help in the Macro/VBA then perhaps you could post in the "Office 365" forum but if so don't forget to mention that you have posted in the Macro/VBA forum and add links in both forums to the postings.

Alf