using excel solver in a loop for dynamic simulation

[mountainman]

Hi,

I'm kind of new to the use of VBA and the excel solver, but I'm having trouble writing a part of a dynamic simulation program. The loop looks OK but the seover won't fill the variable cells with values. I think I must have a problem with the use of the "i" variable...anyone can help on that??

Sub solver_ptE()

Dim i As Integer

For i = 32 To 50 Step 1

SolverOk SetCell:="$I$i", MaxMinVal:=1, ValueOf:="0", ByChange:="$N$i:$O$i"
SolverAdd CellRef:="$L$i", Relation:=2, FormulaText:="$C$27^2"
SolverAdd CellRef:="$M$i", Relation:=2, FormulaText:="$K$i^2"
SolverOk SetCell:="$I$i", MaxMinVal:=1, ValueOf:="0", ByChange:="$N$i:$O$i"
SolverSolve (True)
Solverreset

Next i


End Sub

 

[IRstuff]

Quotes are for literals. Since you are using a variable, it needs to be outside of the literal and should be concatenated to the literal with a + sign. VB should recognize that as a concatenation.

TTFN TTFN

 

[joerd]

As an example what you should use (more or less):

Sub solver_ptE()

Dim i As Integer, s As String

For i = 32 To 50 Step 1
    s = Format(i, "0")
    SolverOk SetCell:="$I$" & s, MaxMinVal:=1, ValueOf:="0", ByChange:="$N$" & s & ":$O$" & s
    SolverAdd CellRef:="$L$" & s, Relation:=2, FormulaText:="$C$27^2"
    SolverAdd CellRef:="$M$" & s, Relation:=2, FormulaText:="$K$" & s & "^2"
    SolverOk SetCell:="$I$" & s, MaxMinVal:=1, ValueOf:="0", ByChange:="$N$" & s & ":$O$" & s
    SolverSolve (True)
    SolverReset

Next i


End Sub

Regards,

Joerd

 

[mountainman]

Thanks you for your help Joerd and irstuff, your reply helped me a lot!!! Now my simulation program is complete and works loke a charm!!

Thanks a lot!!!!

Mountainman