Excel customised ribbon - unexplained deletion of macro called from xml: button onAction

I made a new excel fluent ribbon via the Custom UI Editor for Microsoft Office.
This line of xml occurred in a conventional  tab and group xml segment:

<button id="Tab1Gp1_2" label="FILE path" tag="2" getEnabled="GetEnabled" onAction="file"/>  

But when I saved the the xml, and re-opened the .xlsm file,  the onAction macro file was deleted from the standard module within which it was written (the same module that contained:
Sub RibbonOnLoad(ribbon As IRibbonUI) etc.

No other subs were deleted, and the code ran OK in other versions of the file:

Sub file(control As IRibbonControl)
    RefreshRibbon (4)    'tag for next button to be enabled
    MsgBox "file.id = " & control.ID
End Sub

When I re-entered the macro, it was again deleted.
When I ran these elements in a different excel file and xml, the onAction call worked perfectly.

My next move is to re-build the xml and excel bas files in a new .xlms file.

I have this experience from time to time. Has anyone else had it?
Do you have an explanation, a means of avoiding it, or a means of repairing the file?

thanks
Kelvin
Kelvin4Asked:
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Martin LissOlder than dirtCommented:
Change the name from "file" to something else????
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Martin LissOlder than dirtCommented:
Does the code compile? (VBE->Debug->Compile)?
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Kelvin4Author Commented:
Thank you for a new technique: Debug>Compile VBAProject.
Unless you have further comment; I'm happy to sign off.
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Martin LissOlder than dirtCommented:
If you are interested in learning about debugging you could read my article on the subject.

In any case you’re welcome and I’m glad I was able to help.

If you expand the “Full Biography” section of my profile you’ll find links to some other articles I’ve written that may interest you.

Marty - Microsoft MVP 2009 to 2017
              Experts Exchange MVE 2015
              Experts Exchange Top Expert Visual Basic Classic 2012 to 2017
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