I am slowly learning VBA in Excel on my own so I'm sure this code can be picked a part. Basically users fill this area with info and click a button that in the background copies the data they populate, opens a new workbook and pastes it in the next open row. There are many users, and for some it works, for others it runs with no error but their info is not pasted in the new. location. Most of the stuff at the end is just reformatting, but I didn't want to take it out in case it could be a part of the problem.
Function IsWorkBookOpen(FileName As String)
    Dim ff As Long, ErrNo As Long
    On Error Resume Next
    ff = FreeFile()
    Open FileName For Input Lock Read As #ff
    Close ff
    ErrNo = Err
    On Error GoTo 0
    Select Case ErrNo
        Case 0:    IsWorkBookOpen = False
        Case 70:   IsWorkBookOpen = True
        Case Else: Error ErrNo
    End Select
End Function
Sub FF_Temp_Upload()
'
' FF_Temp_Upload Macro
'
    Application.ScreenUpdating = False
    Dim Workbk As Workbook
    Set Workbk = ThisWorkbook
    Dim LR As Long
    Dim Cell As Long
    Dim Ret As String
    LR = Range("B" & Rows.Count).End(xlUp).Row
    Ret = IsWorkBookOpen("Location of the 2nd workbook/OVS Upload Template.xlsx")
    If Ret = True Then
        MsgBox "Template is currently being updated elsewhere. Please try again."
        Exit Sub
    Else
        Workbooks.Open FileName:= _
    "Location of the 2nd workbook/OVS Upload Template.xlsx"    
    End If
    Workbk.Activate
    Range("A2:C" & LR).Select
    Selection.Copy
    Windows("OVS Upload Template.xlsx").Activate
    If Range("A2") = "" Then
        Range("A2").Select
        Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
            :=False, Transpose:=False
        Application.CutCopyMode = False
    Else
        Range("A1").Select
        Selection.End(xlDown).Offset(1, 0).Select
        Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
            :=False, Transpose:=False
        Application.CutCopyMode = False
    End If
    Workbk.Activate
    Range("H2:H" & LR).Select
    Application.CutCopyMode = False
    Selection.Copy
    Windows("OVS Upload Template.xlsx").Activate
    If Range("L2") = "" Then
        Range("L2").Select
Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
            :=False, Transpose:=False
        Application.CutCopyMode = False
    Else
        Range("L2").Select
        Selection.End(xlDown).Offset(1, 0).Select
        Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
            :=False, Transpose:=False
        Application.CutCopyMode = False
    End If
    ActiveSheet.Range("$A$1:$M$100000").RemoveDuplicates Columns:=1, Header:=xlYes
    LR = Range("B" & Rows.Count).End(xlUp).Row
    Range("B2:B" & LR) = "=text(left(A2,8),""00000000"")"
    Range("B2:B" & LR).Select
    Selection.Copy
    Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
        :=False, Transpose:=False
    Application.CutCopyMode = False
    Range("C2:C" & LR) = "=""DCG""&MID(A2,9,4)"
    Range("C2:C" & LR).Select
    Selection.Copy
    Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
        :=False, Transpose:=False
    Application.CutCopyMode = False
    Range("D2:D" & LR).Select
    Selection.Formula = "DT"
    Range("I2:I" & LR).Select
    Selection.Formula = "730"
    Range("M2:M" & LR).Select
    Selection.Formula = "MAJOH73"
    ActiveWorkbook.Save
    ActiveWindow.Close
    Workbk.Activate
    MsgBox "Articles Uploaded"
End Sub
 
     
    