this error appears when trying to call a sub (An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll) - vb.net

Question

i have a sub that will try to get random foods in the database, get the sum of these food's calories and check if they wont exceed the required calories.
most of the time the sub worked, but sometimes this error appears.
this is my code. it is kinda long.
Private Sub lunchgenerate()
Dim grams As Integer = DSgrams.Tables("grams").Rows(0).Item("grams")
Dim grams1 As Integer = DSricegrams.Tables("ricegrams").Rows(0).Item("grams")
Dim grams2 As Integer = DSgrams2.Tables("grams").Rows(0).Item("grams")
Dim calorieval As Decimal = foodcalories * grams
Dim calorieval1 As Decimal = ricecalories * grams1
Dim calorieval2 As Decimal = foodcalories2 * grams2
Dim carbval As Decimal = foodcarb * grams
Dim carbval1 As Decimal = ricecarb * grams1
Dim carbval2 As Decimal = foodcarb2 * grams2
Dim proteinval As Decimal = foodprotein * grams
Dim proteinval1 As Decimal = riceprotein * grams1
Dim proteinval2 As Decimal = foodprotein2 * grams
Dim fatval As Decimal = foodfat * grams
Dim fatval1 As Decimal = ricefat * grams1
Dim fatval2 As Decimal = foodfat2 * grams
Dim caloriepercent As Decimal = usercalories * 0.5
Dim mincalories As Decimal = caloriepercent - 300
Dim proteinpercernt As Decimal = userprotein * 0.5
Dim minprotein As Decimal = proteinpercernt - 20
Dim counter As Integer = 0
Dim counter1 As Integer = 0
Dim foodcalorietotal As Decimal = calorieval + calorieval1 + calorieval2
Dim foodproteintotal As Decimal = proteinval + proteinval1 + proteinval2
Dim carbtotal As Decimal = carbval + carbval1 + carbval2
Dim foodfattotal As Decimal = fatval + fatval1 + fatval2
If foodcalorietotal < mincalories Or foodcalorietotal > caloriepercent Then
counter = 0
Else
counter = 1
End If
If foodproteintotal < minprotein Or foodproteintotal > proteinpercernt Then
counter1 = 0
Else
counter1 = 1
End If
If counter = 1 And counter1 = 1 Then
'output to the form
Else
**lunchgenerate()**
End If
End If
End Sub
i think the error is when the lunchgenerate() sub is called again.
but just like what i said, most of the times it worked, but sometimes it freezes and then this error appears and then highlights the first line of my code which is
Dim DAlunchcategory As New SqlDataAdapter(lunchquery, CN)
Dim DSlunchcategory As New DataSet
DAlunchcategory.Fill(DSlunchcategory, "category_id")

Answer 1

Stack Overflow error happens when there is no space on the stack (part of the process memory used for local variables, parameter values, function results and a few other little things).
Often the code that produces this error does it by executing infinite recursion. If the code that you showed is complete lunchgenerate function, in the case when either counter or counter1 is not 1, lunchgenerate will be called again with exactly the same outcome, and again, and again, until it completely depletes space on the stack and exception is thrown. You need to have some escape logic to avoid it.