I'll hazard a guess here. It looks to me as though your Do...Loop is
testing on two values (AA25 and AA26) that will never change during
the looping. If it loops once, it will loop forever. So your error
might be related to that rather than the "solver" (GoalSeek?) code.

On Jun 15, 2:58 pm, Brad wrote:
I was getting an error when the solver couldn't come up with the answer.
Added logic to handle the error. Now I get the msgbox showing up even when
solver comes up with the answer. What am I doing wrong.

Sub Solve_for_Face()
Dim cntr As Integer
shtSolve.Unprotect "Canada"
If shtSolve.Range("z19").Value < 5000 Then
shtSolve.Range("z19").Value = 5000
End If
shtSolve.Range("aa25").GoalSeek Goal:=shtSolve.Range("aa26"), _
ChangingCell:=shtSolve.Range("z19")

Do
On Error GoTo newprem
shtSolve.Range("z19").Value = Round(shtSolve.Range("z19").Value, 3)
+ 0.001
Loop Until shtSolve.Range("aa25").Value shtSolve.Range("aa26").Value
shtSolve.Range("z19").Value = shtSolve.Range("z19").Value - 0.001
shtSummary.Range("UnitAmt") = Int(shtSolve.Range("z19") * 1000)
shtSummary.Range("UnitADB") = Int(shtSolve.Range("z21") * 1000)
shtSummary.Protect "Canada"
Exit Sub
newprem:
MsgBox "cannot solve for face enter different premium"
shtSummary.Protect "Canada"
End Sub