Solver VBA loop giving bad results after a few loops

Helado

New Member
Joined
Nov 11, 2018
Messages
1
Hi ,

I wrote a code to run solver , unfortunately after 10 loops the results are not optimal.
This is the code :

Sub Solver()

Dim Pro As Range
Dim Dem As Range
Dim Tot_Pro As Range
Dim Start_Row As Integer
Dim End_Row As Integer
Dim i As Integer
Dim j As Integer


Application.ScreenUpdating = False


Range("D7:F9999").Value = 0


'Loop for runnnig solver on rows
Start_Row = Range("B3")
SolverOptions Precision:=0.000001

Worksheets("Sim").Activate


For i = 1 To 10
SolverReset
End_Row = Start_Row + 20
Set Pro = Range(Cells(Start_Row, 4), Cells(End_Row, 6))
Set Dem = Range(Cells(Start_Row, 3), Cells(End_Row, 3))
Set Tot_Pro = Range(Cells(Start_Row, 7), Cells(End_Row, 7))
SolverOK SetCell:=Range("b5"), _
MaxMinVal:=2, ByChange:=Pro.Address
'SolverAdd cellRef:=Pro.Address, relation:=4 'Integer takes too long
SolverAdd cellRef:=Pro.Address, relation:=3, FormulaText:=0
SolverAdd cellRef:=Tot_Pro.Address, relation:=3, FormulaText:=Dem.Address
SolverAdd cellRef:=Range("D3:f3"), relation:=3, FormulaText:=0
SolverSolve userfinish:=True
Start_Row = End_Row
Next i

'Round numbers loop
j = 4
For j = 4 To 6
i = 7
For i = 7 To End_Row
Cells(i, j) = Application.WorksheetFunction.Round(Cells(i, j), 0)
Next i
Next j

Application.ScreenUpdating = True


End Sub

When I check the results for lines 240+ I see that manually I can receive better results. Looks like the solver engine collapses or something like that.
Any Ideas how to make it work for more loops? I need to run from i =1 to 20 +-

Thanks
 

Excel Facts

Why are there 1,048,576 rows in Excel?
The Excel team increased the size of the grid in 2007. There are 2^20 rows and 2^14 columns for a total of 17 billion cells.

Forum statistics

Threads
1,223,903
Messages
6,175,284
Members
452,630
Latest member
OdubiYouth

We've detected that you are using an adblocker.

We have a great community of people providing Excel help here, but the hosting costs are enormous. You can help keep this site running by allowing ads on MrExcel.com.
Allow Ads at MrExcel

Which adblocker are you using?

Disable AdBlock

Follow these easy steps to disable AdBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the icon in the browser’s toolbar.
2)Click on the "Pause on this site" option.
Go back

Disable AdBlock Plus

Follow these easy steps to disable AdBlock Plus

1)Click on the icon in the browser’s toolbar.
2)Click on the toggle to disable it for "mrexcel.com".
Go back

Disable uBlock Origin

Follow these easy steps to disable uBlock Origin

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back

Disable uBlock

Follow these easy steps to disable uBlock

1)Click on the icon in the browser’s toolbar.
2)Click on the "Power" button.
3)Click on the "Refresh" button.
Go back
Back
Top