Code not running on all opened Workbooks - vba

Question

Looping through opened Workbooks
Its a code to which runs through all opened workbooks but here's a problem that it runs about 10 to 12 times then stops. Can anybody gimme any idea...
Sub OpenAllWorkbooks()
Set destWB = ActiveWorkbook
Dim DestCell As Range
FileNames = Application.GetOpenFilename( _
filefilter:="Excel Files (*.csv*),*.csv*", _
Title:="Select the workbooks to load.", MultiSelect:=True)
If IsArray(FileNames) = False Then
If FileNames = False Then
Exit Sub
End If
End If
For n = LBound(FileNames) To UBound(FileNames)
Set wb = Workbooks.Open(Filename:=FileNames(n), ReadOnly:=True)
Next n
Dim cwb As Workbook
For Each cwb In Workbooks
'With Application
'cwb.AcceptAllChanges
'End With
Call donemovementReport
ActiveWorkbook.Close True
ActiveWorkbook.Close False
Next cwb
End Sub

Answer 1

Why open all workbooks in one go? Open them one by one and then close them as your work is done. For example (Untested)
Sub OpenAllWorkbooks()
Dim wb As Workbook, thisWb As Workbook
Dim DestCell As Range
Dim FileNames As Variant
Dim n As Long
Set thisWb = ThisWorkbook
FileNames = Application.GetOpenFilename( _
filefilter:="Excel Files (*.csv*),*.csv*", _
Title:="Select the workbooks to load.", MultiSelect:=True)
If IsArray(FileNames) = False Then
If FileNames = False Then
Exit Sub
End If
End If
For n = LBound(FileNames) To UBound(FileNames)
Set wb = Workbooks.Open(Filename:=FileNames(n), ReadOnly:=True)
Call donemovementReport
wb.Close SaveChanges:=True
Next n
End Sub

Answer 2

The solution I use to cycle many files in 95% of cases - perhaps may be helpful:
Sub CSV_Cycling()
InputFolder = "D:\DOCUMENTS\"
LoopFileNameExt = Dir(InputFolder & "*.csv")
Do While LoopFileNameExt <> ""
'Application.DisplayAlerts = False
Application.Workbooks.Open (InputFolder & LoopFileNameExt)
'Application.DisplayAlerts = True
[..........YOUR CODE..........]
LoopFileNameExt = Dir
Loop 'Input Folder Files Cycling
End Sub
Uncomment Application.DisplayAlerts = strings to avoid any warnings - if required (however be careful - files will be opened using "default" options) and change source path, of course).