Error "Ambiguous name detected: My Function Name" after function has been used for months

[capson]

I am getting the error "Ambiguous name detected: My Function Name" this has happened a couple of times always I have been using the function since the project began this could be a year.

Then one day I open the workbook and I get the error message?

In this instance I get

"Ambiguous name detected: goFast" I use this everywhere in all my projects with never a problem, in this project for the last 7 months, I use it like so:

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If I comment out the goFast excel just finds the next instance and gives the same error

Any ideas what is going on here it is kinda freaking me out

Thanks

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[Norie]

Do you have anything else, eg module, function, codename etc, called 'gofast'?

Also do you have this repeated anywhere?

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[capson]

Hello Norie, yes it turns out, a friend sent me a .bas module with some code in it and he had the sub called goFast in it (which I had sent him maybe a year ago) and I did not catch it

Thanks