Macro error - Run time error 1004 (App defined/Object Defined error)

There is something in my code which is causing a run time error when used. I have this same basic line of code in several other macros to simply copy the formula down to the last row of data. For whatever reason, it doesn't work in this macro. The only thing I can think of is that the data that is being manipulated is in the last column with data. Could that be the culprit? Here is the piece of code that is problematic...

Note: the bolded line is where it takes me when I try to debug.

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hi jlax34, have you checked the LastRow variable? I suppose it's equal to zero or even negative. Add the following line after:

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If it's not post a workbook where this error can be reproduced with your code.

Shg,

Popped that in and while I didn't get an error, it also didn't copy the formula down to the last row.

waterserv,

Last Row does = 0

zero value causes error when using Resize method, it should be Long type and more than zero

Ahh gotcha! F is a blank column in this spreadsheet, but it hasn't been in any of the other spreadsheets I've used this in. I thought it may be referencing a blank column, but the novice I am was looking on the wrong row for the reference. That fixed the problem. Thank you both for your time!