Try the following which is trapped against the usual errors.
Code:
Option Explicit
Sub CopyStyle()
Dim oSource As Document
Dim oTarget As Document
Dim strFullName As String
Dim fso As Object
strFullName = Environ("USERPROFILE") & "\Desktop\EXAMPLE.docx"
On Error Resume Next
If LCase(ActiveDocument.FullName) = LCase(strFullName) Then
MsgBox "The active document is the style source document!"
GoTo lbl_Exit
End If
Set fso = CreateObject("Scripting.FileSystemObject")
Set oTarget = ActiveDocument
oTarget.Save
If oTarget.Path = "" Then
MsgBox "The document must be saved!"
GoTo lbl_Exit
End If
If fso.FileExists(strFullName) Then
Set oSource = Documents.Open(FileName:=strFullName, _
Visible:=False, _
AddToRecentFiles:=False)
Application.OrganizerCopy Source:= _
oSource.FullName, Destination:= _
oTarget.FullName, _
Name:="Caption-Photo", _
Object:=wdOrganizerObjectStyles
oSource.Close
Else
MsgBox strFullName & " is not available"
End If
lbl_Exit:
Set oTarget = Nothing
Set oSource = Nothing
Set fso = Nothing
Exit Sub
End Sub