Scope of Cell Object in For Loop - VBA - vba

Question

I'm working on a bit of VBA that's intended to loop over a Schedule Builder for students made in Excel. I keep getting an Error 424 during the assignments c = c.Offset(X, 0), but only in the nested For loops. Is there a limited scope, and if so, how do I overcome it?
Below is the code:
Public Sub generateRosters()
Worksheets("Course Rosters").Cells.ClearContents
Worksheets("Course Rosters").Range("A1") = "Course"
Worksheets("Course Rosters").Range("B1") = "Room"
Dim classTitleRange As Range
Set classTitleRange = Worksheets("Master School Schedule").Range("D1:BN1")
Dim rowCount As Integer
rowCount = 2
Dim periodArr(1 To 8) As String
periodArr(1) = "A"
periodArr(2) = "B"
periodArr(3) = "C"
periodArr(4) = "D"
periodArr(5) = "E"
periodArr(6) = "F"
periodArr(7) = "G"
periodArr(8) = "Z"
For Each c In classTitleRange.Cells
Dim courseTitle As String
courseTitle = c
c = c.Offset(2, 0)
Dim room As String
room = c
For Each p In periodArr()
Dim offsetCount As Integer
offsetCount = 0
For i = 1 To 340
c = c.Offset(1, 0) '424 Error One
If c = p Then
End If
offsetCount = offsetCount + 1
Next
c = c.Offset(-offsetCount, 0) '424 Error Two
Next
Worksheets("Course Rosters").Range("A" & rowCount) = "'" & courseTitle
Worksheets("Course Rosters").Range("B" & rowCount) = room
rowCount = rowCount + 1
Next
End Sub
Thanks, for your help.
Edit: Side question, is there a way for me to create a variable that I can manipulate like c, but not be c. Basically a Dim d As (Something) followed by d = c. I can't seem to find the right object to assign to d, so that I can make it c. Thanks again.

Answer 1

I don't get logic and goal of your code therefore there are only some tips for you:
c=c.offset(2,0)
changes initial Range type c variable into empty or any other value.
Next you try to use, in the line with error, the same c variable as range object which is not allowed.
What you possibly need is the Set instruction in the following lines:
Set c= c.offset(2,0)
'....
Set c= c.offset(1,0)
But as I said, I don't know the complete logic therefore this is solution for the error you have but not sure if it solve all your problems.