Excel VBA Loop That Not Stops Based On Activecell Value - vba

Question

I have a loop that needs to stop when activecell value is "BBSE", but it passes the cell and continues the loop. someone can help me with that?
I cut rows from table in one workbbok and paste it to another. before the list in column F I have many blank cells, and because of that I am usind xldown.
Here is the relevant code:
'Illuminators Worksheet
OP_wb.Activate
Range("F2").End(xlDown).Select
Do Until ActiveCell.Value = "BBSE"
OP_wb.Activate
Worksheets("Optic Main").Activate
Range("F2").End(xlDown).Select
Selection.EntireRow.Cut
Demand_WB.Activate
Worksheets("Illuminators").Activate
Range("A" & Rows.Count).End(xlUp).Offset(1).Select
ActiveSheet.Paste
Loop
Here is where I want to stop the loop in the red circle:
this is why I am using END.xlDown

Answer 1

If I understand what you are trying to achieve correctly, I believe the following will achieve it:
Dim startRow As Long
Dim endRow As Long
With OP_wb.Worksheets("Optic Main")
startRow = .Range("F2").End(xlDown).Row
endRow = .Columns("F").Find(What:="BBSE", LookIn:=xlValues, LookAt:=xlWhole).Row
.Rows(startRow & ":" & endRow).Cut
End With
With Demand_WB.Worksheets("Illuminators")
.Range("A" & .Rows.Count).End(xlUp).Offset(1).Insert Shift:=xlDown
End With

Answer 2

May be try like this...
'Mentioning Starting Row Here
x = 2
Do
'x refers to Row and F refer to column name
With Cells(x, "F")
'Exiting Do Loop once it finds the matching value using If statement
If .Value = "BBSE" Then Exit Do
OP_wb.Activate
Worksheets("Optic Main").Activate
.EntireRow.Cut
Demand_WB.Activate
Worksheets("Illuminators").Activate
Range("A" & Rows.Count).End(xlUp).Offset(1).Select
ActiveSheet.Paste
End With
'Incrementing row number here to move on to next row
x = x + 1
Loop