If the cell contains an error, then this line will fail:
If ws.Cells(r, 3).Value = "" Then

Instead, you could just check what's displayed in the cell:
If ws.Cells(r, 3).Text = "" Then

Mikmo wrote:

I'm getting error 13 "type mismatch" when I run the below code. I've
tested it on a small new excel sheet and it work fine. There are no
other macros in my excel sheet so no conflicts.

Any ideas?

I'm trying to hide all rows were the value in column A of that row is
blank / 0.

Sub blank_rows()

Dim ws As Worksheet
Dim wb As Workbook
Dim hide_rw As Long

Application.EnableEvents = False

Set wb = ActiveWorkbook
Dim end_row As Integer
For Each ws In wb.Worksheets
end_row = ws.Range("A65536").End(xlUp).Row 'this assumes the
last value is in Column A.
For r = 1 To end_row 'change the 4 to be the first row you wish
to check
* If ws.Cells(r, 3).Value = "" Then*
ws.Rows(r).Hidden = True
End If
Next
Next

Application.EnableEvents = True
End Sub

--
Mikmo

--

Dave Peterson