How to handle user input error
 

I've written the following to create a new worksheet in the existing
workbook after getting some key data from the user:

Public Sub CreateTribalSheet()

Set wbTribal = ThisWorkbook
Set wsSource = wbTribal.Sheets("Source")

bDataEnt = False
bCancel = False
bFinish = False
bNewData = False

If ThisWorkbook.Name = ActiveWorkbook.Name Then
MsgBox _
"Do not use this workbook to create your reports." _
& Chr(10) & _
"Open a previously used workbook or start" _
& Chr(10) & _
"a new one for the current fiscal year"
End
End If

Application.ScreenUpdating = False

' Get facility name and no. of records from user
lFacilRowsUI = 0
lStartRow = 7


Do
'Show the Facility entry form
frmFacil.Show
Unload frmFacil

If bNewData = True Then
If bDataEnt = False Then
'Add and format new worksheet
Call AddFormatNewWksht
bDataEnt = True
End If
End If
' Application.ScreenUpdating = True
Call EnterFacilData

Loop Until bFinish = True

Call EnterMonthlyTotals
Call TribeNameServDate
Call FileNameandSave
Application.ScreenUpdating = True
ws.Protect Password:=PWORD
End Sub

It calls frmFacil which has the following code for the "Finish" button:

Private Sub btnFinish_Click()
sFacilNameUI = frmFacil.tbFacilName.Text
On Error Resume Next
lFacilRowsUI = frmFacil.tbFacilRows.Value
On Error GoTo 0
If sFacilNameUI < "" And lFacilRowsUI < 0 Then
bNewData = True
bFinish = True
Else
If bDataEnt = False Then
MsgBox "Please enter a both a Facility Name and" & Chr(10) & _
"the number of clients served!", vbOKOnly
'### WHAT TO PUT HERE? ###
Else
bNewData = False
bFinish = True
End If
End If
Unload frmFacil
End Sub

What I don't know is what to do if they fail to fill in the form properly
(the turnover rate is very high, mostly people with NO xl experience at
all). What I want is for the form to reappear and give them another chance
to fill it in. I've tried putting in a goto (or resume) back to the
CreateTribalSheet macro where I show '### WHAT TO PUT HERE ###, even made
that macro public, but I get a compile error, "Label not defined" on the
CreateTribalSheet (even though it knows how to capitalize it when I enter
it!). I'm sure there's a simple error handling procedure of which I'm
unaware. So who is?

Thanks.