Why is my array returning empty? And how do I ensure it copies the data into my third selection - excel

Question

After countless efforts to keep the array "newvarray" within range, I am now running into a result of an empty array from a 278 line column. I believe this is also the root cause of my endgame function not executing (pasting unmatched values into the rolls sheet)?
Clarification: the actualy empty cells report on locals as "Empty", the columns with string report as " "" "
Dim oldsht As Worksheet
Dim newsht As Worksheet
Dim rollsht As Worksheet
Dim a As Integer
Dim b As Integer
Dim c As Integer
Set oldsht = ThisWorkbook.Sheets("Insert Yesterday's Report Here")
Set newsht = ThisWorkbook.Sheets("Insert Today's Report Here")
Set rollsht = ThisWorkbook.Sheets("Rolls")
Dim OldVArray(), NewVArray(), RollArray() As String
ReDim Preserve OldVArray(1 To oldsht.Range("a" & Rows.Count).End(xlUp).Row - 1, 5 To 5)
ReDim Preserve NewVArray(2 To newsht.Range("a" & Rows.Count).End(xlUp).Row, 5 To 5)
ReDim Preserve RollArray(1 To rollsht.Range("a" & Rows.Count).End(xlUp).Row - 1, 3 To 3)
For a = 2 To oldsht.Range("E" & Rows.Count).End(xlUp).Row
OldVArray(a, 5) = oldsht.Cells(a, 5)
Next a
For b = 2 To newsht.Range("E" & Rows.Count).End(xlUp).Row
NewVArray(b, 5) = newsht.Cells(b, 5)
Next b
For c = 2 To rollsht.Range("C" & Rows.Count).End(xlUp).Row
RollArray(c, 3) = rollsht.Cells(c, 3)
Next c
Dim Voyage As String
For a = 2 To UBound(OldVArray)
Voyage = OldVArray(a, 5)
For b = 2 To UBound(NewVArray)
voyage2 = NewVArray(b, 5)
If voyage2 <> Voyage Then
If voyage2 <> "" Then
For Each cell In NewVArray
voyage2 = rollsheet.Range("C:C")
Next
End If
End If
Next
Next
Here are snips of sample idea, highlighted are the rows that need to be found, and the voyage that changed is in orange. Third on Rolls would be the output of the macro.
Oldsheet:
Newsheet:
Rolls:

Answer 1

Untested, but this is how I'd do it. Just going from your screenshots. If your actual data looks different then you will need to make some adjustments.
Sub test()
Dim wb As Workbook, oldsht As Worksheet, newsht As Worksheet, rollsht As Worksheet
Dim c As Range, id, col, cDest As Range, copied As Boolean, m
Set wb = ThisWorkbook
Set oldsht = wb.Sheets("Insert Yesterday's Report Here")
Set newsht = wb.Sheets("Insert Today's Report Here")
Set rollsht = wb.Sheets("Rolls")
'next empty row on Rolls sheet
Set cDest = rollsht.Cells(Rows.Count, "A").End(xlUp).Offset(1)
'loop colA on new sheet
For Each c In newsht.Range("A2:A" & newsht.Cells(Rows.Count, "A").End(xlUp).row).Cells
id = c.Value 'identifier from Col A
If Len(id) > 0 Then
m = Application.Match(id, oldsht.Columns("A"), 0) 'check for exact match on old sheet
If Not IsError(m) Then
'got a match: check for updates in cols B to C
copied = False
For col = 2 To 3
If c.EntireRow.Cells(col).Value <> oldsht.Cells(m, col).Value Then
If Not copied Then 'already copied this row?
cDest.Resize(1, 3).Value = c.Resize(1, 3).Value 'copy changed row
Set cDest = cDest.Offset(1) ' next empy row
copied = True
End If
cDest.EntireRow.Cells(col).Interior.Color = vbRed 'flag updated value
End If
Next col
Else
cDest.Resize(1, 3).Value = c.Resize(1, 3).Value 'copy new row
Set cDest = cDest.Offset(1) ' next empy row
End If
End If
Next c
End Sub