Macro Code Will Not Stop Saving In My Module

So I am Very New with Macros. Any Help would be appreciated. I have a code That I am running in my Module. It is designed to Stop Everything (ie Invoice Register, Todays Date, Saving) Unless All Specific Cells Are filled. I have managed to splice together a code that opens a message window and higlights the blank cells. It still However continues with the rest of my Macro Including Saving. This My Complete Module Code:

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Thank you in advance. Any Help would be appreciated

TBM it is important to use code tags when posting your code so that we can read it more easily. Highlight your code and press the # symbol in the menu just above the message box.

Only a small part of your code has been fixed, but if I understand this correctly, one macro (fullmacsro) calls a sequence of events. The first sub called from that one (FillCells) is the one that should stop the rest from happening if there are blanks? What is the meaning of the Cancel variable? It does not seem to be used, just assigned a true or false value.
If I understand correctly you would like the code to stop in this area:

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Cancel = True will not just stop the program, and if that is what you expected, then the code is supposed to stop running completely at that point? You could replace it with:

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which would message "Incomplete Data" and then just stop all code from running right after.

Glad we could help