Loop Syntax Issues - vba

Question

I am coding a series of loops to search one table row by row for data, and if it meets the correct specs within that row it will pull a certain value from said row and place it in a cell I want in a separate table on another chart. I am getting the error saying that there is a "Next" without a "For", but there is (unless I am entirely missing something). It also has the Sub line at the top highlighted (I am trying to run this as a macro). Let me know where I am going wrong here, thanks!
Option Explicit
Sub GraphLoop()
Dim i, g, row, color, roundcount, round, materialcount, material As Long
Dim chartdatacol, chartdatarow As Long
Worksheets("Chart Data").Range("C6:DR10000").Value = ""
roundcount = 1
materialcount = 1
color = 1
round = 1
material = 1
chartdatacol = 3
chartdatarow = 6
i = 4
For chartdatacol = 3 To Worksheets("Running Avg Log").Cells(4, cols.Count).End(xlUp).row
Do Until i = Worksheets("Running Avg Log").Cells(Rows.Count, "A").End(xlUp).row
g = 1
If Worksheets("Running Avg Log").Cells(i, 1).Value = Worksheets("Chart Data").Cells(chartdatarow, 2).Value _
And Worksheets("Running Avg Log").Cells(i, 2).Value = round _
And Worksheets("Running Avg Log").Cells(i, 3).Value = color _
And Worksheets("Running Avg Log").Cells(i, 4).Value = material Then
row = chartdatarow
Worksheets("Chart Data").Cells(row, chartdatacol).Value = _
Worksheets("Running Avg Log").Cells(i, 6 + Worksheets("Analysis").Range("C5").Value).Value
chartdatarow = chartdatarow + 1
i = 4
Else
i = i + 1
End If
Loop
color = color + 1
' loops through ten colors
If color > 10 Then
color = 1
End If
roundcount = roundcount + 1
materialcount = materialcount + 1
' every ten columns, material changes, every 30 columns, it repeats
If materialcount = 11 Or 21 Then
material = material + 1
End If
If materialcount > 30 Then
materialcount = 1
material = 1
' each round's 30 combos is 30 columns
If roundcount = 31 Then
round = round + 1
End If
Next chartdatacol
End Sub

Answer 1

You left out an End If here:
If materialcount > 30 Then
materialcount = 1
material = 1
' each round's 30 combos is 30 columns
BTW, another correction to make:
If materialcount = 11 Or 21 Then
should be:
If materialcount = 11 Or materialcount = 21 Then

Answer 2

You had an If without End If
See modified code below , I marked with ********* the place you were missing the End If :
Option Explicit
Dim i, g, row, color, roundcount, round, materialcount, material As Long
Dim chartdatacol, chartdatarow As Long
Sub GraphLoop()
Worksheets("Chart Data").Range("C6:DR10000").Value = ""
roundcount = 1
materialcount = 1
color = 1
round = 1
material = 1
chartdatacol = 3
chartdatarow = 6
i = 4
For chartdatacol = 3 To Worksheets("Running Avg Log").Cells(4, Columns.Count).End(xlUp).row
Do Until i = Worksheets("Running Avg Log").Cells(Rows.Count, "A").End(xlUp).row
g = 1
If Worksheets("Running Avg Log").Cells(i, 1).Value = Worksheets("Chart Data").Cells(chartdatarow, 2).Value _
And Worksheets("Running Avg Log").Cells(i, 2).Value = round _
And Worksheets("Running Avg Log").Cells(i, 3).Value = color _
And Worksheets("Running Avg Log").Cells(i, 4).Value = material Then
row = chartdatarow
Worksheets("Chart Data").Cells(row, chartdatacol).Value = _
Worksheets("Running Avg Log").Cells(i, 6 + Worksheets("Analysis").Range("C5").Value).Value
chartdatarow = chartdatarow + 1
i = 4
Else
i = i + 1
End If
Loop
color = color + 1
' loops through ten colors
If color > 10 Then
color = 1
End If
roundcount = roundcount + 1
materialcount = materialcount + 1
' every ten columns, material changes, every 30 columns, it repeats
If materialcount = 11 Or 21 Then
material = material + 1
End If
If materialcount > 30 Then
materialcount = 1
material = 1
' each round's 30 combos is 30 columns
If roundcount = 31 Then
round = round + 1
' **** YOU WERE MISSING the End If here ***
End If
End If
Next chartdatacol
End Sub