Hi S,
What does the popup say?
If it is the one where XL is warning to save a changed file then you have to ask yourself if the process did indeed change the XL or that someone/something else did.
As for XL closing, this could be the process or something else. Does you process have the possibility to close the XL before being finished with it? Does the close happen every time you run the process?
Stepping (aka debugging) your process should bring clarity as to what is going on.
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Happy coding!
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Paul
Sweden
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Happy coding!
Paul, Sweden
(By all means, do not mark this as the best answer!)