Export .STEP files into .PART

Hi all, 

I am trying to create a macro to automate treatement of imported step files. My goal is, from a file open in SW (from steps to asm), save it as a part and then execute diagnosis import. Unfortunately I am not able to get the current directory of the Active file (particularly a .step file)  thru swModel.GetFileName as it returns ""

Below is my code. 

Any thoughts ?

Thanks for helping


'Option Explicit

Dim swApp As Object
Dim swPart As SldWorks.PartDoc
Dim swModel As SldWorks.ModelDoc2
Dim Part As Object
Dim boolstatus As Boolean
Dim longstatus As Long, longwarnings As Long
Dim swModelDocExt As SldWorks.ModelDocExtension
Dim filewarning As Long
Dim fileerror As Long
Dim Name As String
Dim Folder As String
Dim Path As String
Dim MyPath As String
Dim NewFileName As String
Dim Extension As String

Sub main()

Set swApp = Application.SldWorks
Set swModel = swApp.ActiveDoc
Set Part = swApp.ActiveDoc

Name = swModel.GetTitle()
MsgBox (Name)
Folder = swApp.GetFilePath()
MsgBox (Folder)
Ext = ".sldprt"
NewFileName = Folder & "\" & Name & Ext
'
MsgBox (NewFileName)
' Save As
longstatus = Part.SaveAs3(NewFileName, 0, 2)
'FileName = NewFileName

'Open the SOLIDWORKS part document to export to a STEP file
Set swPart = swApp.OpenDoc6(NewFileName, swDocPART, swOpenDocOptions_Silent, "", fileerror, filewarning)
Set swModel = swPart

'Get import information
Set swImportPartData = swApp.GetImportFileData(swPart)
End Sub