I want to save file as:

firstname.lastname.docx
in folder c:\users\savvy\documents\final doc\
firstname and lastname are bookmarks from userform

but am getting

runtime error 5152


this is not a valid filename

code:
strPath = Environ("USERPROFILE") & "\Documents\final doc"
ActiveDocument.SaveAs strPath & TextBox2.Text & "." & TextBox1.Text & ".docx"

any advice appreciated

I think you missed a backslash. Add another couple of lines to see what the full path is

strPath = Environ("USERPROFILE") & "\Documents\final doc"
strPath = strPath & TextBox2.Text & "." & TextBox1.Text & ".docx"
Debug.Print strPath
ActiveDocument.SaveAs strPath

__________________
Andrew Lockton
Chrysalis Design, Melbourne Australia

Thanks. I tried everything but ended up with saved file with wrong name
final doctextbox2.textbox1.docx

So I changed
strPath = Environ("USERPROFILE") & "\Documents\final doc" to
strPath = "C:\Users\user\Documents\final doc"
and that works

As 'final doc' is the folder then you want
and that folder must exist. Note the back slash at the end of the first line

__________________
Graham Mayor - MS MVP (Word) (2002-2019)
Visit my web site for more programming tips and ready made processes www.gmayor.com

It is also possible that the text in TextBox2 and TextBox1 contains an invalid character which could cause an error. For instance, you wouldn't be allowed to save a filename containing any of these characters:
<>"|?*

__________________
Andrew Lockton
Chrysalis Design, Melbourne Australia