VBA code hanging Excel - vba

Question

I wrote a code to grab the raw data in a file and summarize the data based to "date" of report and copy this summarized data into the target workbook according to the "date" value.
When I tried to run this code. it works fine for one file, but hangs up in another file. When I try to debug it I am not able to follow the flow of code. It breaks up suddenly. Can you help me in fixing this issue?
Option Explicit
Sub file_select()
Dim RequiredFileName As Variant, i As Integer
Dim targetWorkbook As Workbook
' making weak assumption that active workbook is the target
Set targetWorkbook = Application.ActiveWorkbook
'RequiredFileName = "c:\myfiles\test.xls"
On Error GoTo EndNow
RequiredFileName = Application.GetOpenFilename(FileFilter:="ALL Files (*.*), *.*", Title:="Get File", MultiSelect:=True)
For i = 1 To UBound(RequiredFileName)
MsgBox RequiredFileName(i), , GetFileName(CStr(RequiredFileName(i)))
Next i
For i = 1 To UBound(RequiredFileName)
Call ProcessOpenFile(RequiredFileName(i), targetWorkbook)
Next i
EndNow: End Sub
Function GetFileName(filespec As String)
Dim fso As Object
Set fso = CreateObject("Scripting.FileSystemObject")
GetFileName = fso.GetFileName(filespec)
End Function
Sub ProcessOpenFile(RequiredFileName, targetWorkbook As Workbook)
Dim RequiredWorkbook As Workbook
'Dim targetWorkbook As Workbook
' get the required workbook
Set RequiredWorkbook = Application.Workbooks.Open(RequiredFileName)
Dim targetSheet As Worksheet
Set targetSheet = targetWorkbook.Worksheets("Summary_NV")
Dim RequiredSheet As Worksheet
Set RequiredSheet = RequiredWorkbook.Sheets(1) 'here assumed that source workbook consists only of one sheet i.e., is the required sheet.
RequiredWorkbook.Sheets.Add After:=Sheets(Sheets.Count)
RequiredWorkbook.Sheets(Sheets.Count).Select
RequiredWorkbook.Sheets(Sheets.Count).Name = "SUMMARY" & Sheets.Count
Call Sort_Before(RequiredWorkbook) 'sorting the required file data according to date.
If RequiredSheet.Name = "EVDO_SC_Summary" Then
Call ProcessEVDO(RequiredSheet) 'get the summary of report
Call Sort_After(RequiredWorkbook) ' sort the summary according to date
Call DateChange(RequiredWorkbook) 'changing date format
ElseIf RequiredSheet.Name = "CDMAVoice_SC_Summary" Then
Call ProcessVoice(RequiredSheet)
Call Sort_After(RequiredWorkbook)
Call DateChange(RequiredWorkbook)
ElseIf RequiredSheet.Name = "CDMAData_SC_Summary" Then
Call ProcessData(RequiredSheet)
Call Sort_After(RequiredWorkbook)
Call DateChange(RequiredWorkbook)
End If
Dim iRow As Integer
Dim LastRow_Req As Integer
Dim LastRow_Tar As Integer
Dim LastCol_Req As Integer
LastRow_Req = RequiredWorkbook.Sheets(Sheets.Count).Cells(Rows.Count, 1).End(xlUp).Row 'last row summary data
LastCol_Req = RequiredWorkbook.Sheets(Sheets.Count).Cells(1, Columns.Count).End(xlToLeft).Column 'last column of summary data
LastRow_Tar = targetSheet.Cells(Rows.Count, 1).End(xlUp).Row 'last row of target sheet used
RequiredWorkbook.Sheets(Sheets.Count).Range("B1").Resize(LastRow_Req, LastCol_Req - 1).Select 'selecting summary data for copying
Selection.Copy
If targetSheet.Cells(LastRow_Tar, 1).Value < RequiredWorkbook.Sheets(Sheets.Count).Range("A1").Value Then 'if date entered in target sheet last cell is less
If RequiredWorkbook.Sheets(1).Name = "EVDO_SC_Summary" Then 'then the summary report date
targetSheet.Activate
Cells(LastRow_Tar + 1, 16).Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
Cells(LastRow_Tar + 1, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, LastRow_Tar + 1, 1)
ElseIf RequiredWorkbook.Sheets(1).Name = "CDMAVoice_SC_Summary" Then
targetSheet.Activate
Cells(LastRow_Tar + 1, 2).Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
Cells(LastRow_Tar + 1, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, LastRow_Tar + 1, 1)
ElseIf RequiredWorkbook.Sheets(1).Name = "CDMAData_SC_Summary" Then
targetSheet.Activate
Cells(LastRow_Tar + 1, 9).Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
Cells(LastRow_Tar + 1, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, LastRow_Tar + 1, 1)
End If
End If
For iRow = targetSheet.Range("A12").Row To LastRow_Tar
RequiredWorkbook.Activate
If targetSheet.Cells(iRow, 1).Value < RequiredWorkbook.Sheets(Sheets.Count).Range("A1").Value Then
GoTo A
ElseIf targetSheet.Cells(iRow, 1).Value = RequiredWorkbook.Sheets(Sheets.Count).Range("A1").Value Then
If RequiredWorkbook.Sheets(1).Name = "EVDO_SC_Summary" Then
targetSheet.Activate
Cells(iRow, 16).Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
Cells(iRow, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, iRow, 1)
Exit For
ElseIf RequiredWorkbook.Sheets(1).Name = "CDMAVoice_SC_Summary" Then
targetSheet.Activate
Cells(iRow, 2).Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
Cells(iRow, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, iRow, 1)
Exit For
ElseIf RequiredWorkbook.Sheets(1).Name = "CDMAData_SC_Summary" Then
targetSheet.Activate
Cells(iRow, 9).Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
:=False, Transpose:=False
Cells(iRow, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, iRow, 1)
Exit For
End If
ElseIf targetSheet.Cells(iRow, 1).Value > RequiredWorkbook.Sheets(Sheets.Count).Range("A1").Value Then
If RequiredWorkbook.Sheets(1).Name = "EVDO_SC_Summary" Then
targetSheet.Activate
Cells(iRow, 16).Select
Selection.Insert Shift:=xlDown
Exit For
Cells(iRow, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, iRow, 1)
ElseIf RequiredWorkbook.Sheets(1).Name = "CDMAVoice_SC_Summary" Then
targetSheet.Activate
Cells(iRow, 2).Select
Selection.Insert Shift:=xlDown
Cells(iRow, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, iRow, 1)
Exit For
ElseIf RequiredWorkbook.Sheets(1).Name = "CDMAData_SC_Summary" Then
targetSheet.Activate
Cells(iRow, 9).Select
Selection.Insert Shift:=xlDown
Cells(iRow, 1).Select
Call Date_update(RequiredWorkbook, targetWorkbook, iRow, 1)
Exit For
End If
End If
A: Next
RequiredWorkbook.Close savechanges:=False
End Sub

Answer 1

Answered in a comment "Code is going into infinite loop" – user1806794