Error selecting range cells to copy from multiple work books - vba

Question

Updated in response to comment from dwirony:
I am trying to create a code that copies information from the same cells in multiple workbooks and combines the information into a single summary workbook. The code below works as written, however, if I add more cell address to the sourceRange (starting on line 69) the macro still runs but no information is copied into the new summary workbook.
Original Question:
I am trying to select the same specific cells from multiple worksheets within a single folder and combine them into a master spreadsheet. The code works up to a certain number of cells, but if I try to include any more, the macro returns a blank workbook (except for the column headings I've assigned). Cells that work initially will won't work if there are too many selected cells. i.e., in the code shown below, cell J2 is the first and the last cell called and the program runs. If I add J2 again, (range ends ...J2, J2")or any other cell, it appears that I've hit a limit somewhere and I get a blank workbook.
I have zero previous experience with VBA and macros, and everything I've put together comes from a variety of internet and internal sources. Maybe the multiple sources are the source of the error?
Any help would be greatly appreciated!
Sub MergeAllWorkbooks()
Dim MyPath As String, FilesInPath As String
Dim MyFiles() As String
Dim SourceRcount As Long, FNum As Long
Dim mybook As Workbook, BaseWks As Worksheet
Dim sourceRange As Range, destrange As Range
Dim rnum As Long, CalcMode As Long
Dim a As Range, c As Range
Dim x As Long
' Change this to the path\folder location of your files.
MyPath = "C:\Users\amiller\OneDrive - CoorsTek\temp"
' Add a slash at the end of the path if needed.
If Right(MyPath, 1) <> "\" Then
MyPath = MyPath & "\"
End If
' If there are no Excel files in the folder, exit.
FilesInPath = Dir(MyPath & "*.xls*")
If FilesInPath = "" Then
MsgBox "No files found"
Exit Sub
End If
' Fill the myFiles array with the list of Excel files
' in the search folder.
FNum = 0
Do While FilesInPath <> ""
FNum = FNum + 1
ReDim Preserve MyFiles(1 To FNum)
MyFiles(FNum) = FilesInPath
FilesInPath = Dir()
Loop
' Set various application properties.
With Application
CalcMode = .Calculation
.Calculation = xlCalculationManual
.ScreenUpdating = False
.EnableEvents = False
End With
' Add a new workbook with one sheet.
Set BaseWks = Workbooks.Add(xlWBATWorksheet).Worksheets(1)
rnum = 1
' Loop through all files in the myFiles array.
If FNum > 0 Then
For FNum = LBound(MyFiles) To UBound(MyFiles)
Set mybook = Nothing
On Error Resume Next
Set mybook = Workbooks.Open(MyPath & MyFiles(FNum))
On Error GoTo 0
If Not mybook Is Nothing Then
On Error Resume Next
' Change this range to fit your own needs.
With mybook.Worksheets(1)
Set sourceRange = .Range("J2, C2, D7, F7, K7, G10, J10, G11, J11, G12, J12, G14, J14, G15, J15, G16, J16, G17, J17, J21," _
& "J2, D24, E24, G24, I24, J24, O24, P24, Q24, R24, S24, D25, E25, G25, I25, J25, O25, P25, Q25, R25, S25," _
& "D26, E26, G26, I26, J26, O26, P26, Q26, R26, S26, D27, J2")
End With
If Err.Number > 0 Then
Err.Clear
Set sourceRange = Nothing
Else
' If source range uses all columns then
' skip this file.
If sourceRange.Columns.Count >= BaseWks.Columns.Count Then
Set sourceRange = Nothing
End If
End If
On Error GoTo 0
If Not sourceRange Is Nothing Then
SourceRcount = sourceRange.Rows.Count
If rnum + SourceRcount >= BaseWks.Rows.Count Then
MsgBox "There are not enough rows in the target worksheet."
BaseWks.Columns.AutoFit
mybook.Close savechanges:=False
GoTo ExitTheSub
Else
' Copy the file name in column A.
With sourceRange
BaseWks.Cells(rnum + 1, "A"). _
Resize(.Rows.Count).Value = MyFiles(FNum)
End With
' Set the destination range.
Set destrange = BaseWks.Range("B" & rnum + 1)
x = 0
For Each a In sourceRange.Areas
For Each c In a.Cells
x = x + 1
destrange.Offset(0, x - 1).Value = c.Value
Next c
Next a
' Copy the values from the source range
' to the destination range.
With sourceRange
Set destrange = destrange. _
Resize(.Rows.Count, .Columns.Count)
End With
destrange.Value = sourceRange.Value
rnum = rnum + SourceRcount
End If
End If
mybook.Close savechanges:=False
End If
Next FNum
BaseWks.Columns.AutoFit
End If
ExitTheSub:
' Restore the application properties.
With Application
.ScreenUpdating = True
.EnableEvents = True
.Calculation = CalcMode
End With
End Sub