Chr(34) function not working in MS Access 2010

Have you set a reference to MFunctions?
Have you declared fn and provided it a value?

Absent those issues, your code is compiling in my copy of Access 2010

In the Tools/References I do not find MFunctions. I have not declared fn and provided a value. I don't understand. Below is the code for the sub:
Public Sub OpenDoc(fn As String)
On Error GoTo PROC_ERR
    Dim path As String
    Dim dir As String
    Dim wdpath As String

    dir = MFunctions.ReadFile("CL_FileDir.txt")
    path = "C:\" & dir & "\" & fn & ".docx"
       
    wdpath = "WinWord.exe" & " " & Chr(34) & path & Chr(34)

    Shell wdpath, vbNormalFocus
PROC_EXIT:
    Exit Sub
PROC_ERR:
    MsgBox Err.Description & ": " & Err.Number
    Resume PROC_EXIT
End Sub

When I put sub OpenDoc in a module sheet of a new database, the compiler rejects the statement using MFunctions--saying "Variable not defined"

Given the rest of that statement, I speculated that MFunctions might be an object in a library that you had set a reference to in Access 2007, but which you had not done so for Access 2010.

byundt, my apology. MFunctions is a module and ReadFile a defined function. The code is below:

Public Function ReadFile(FName) As String
On Error GoTo PROC_ERR

    Dim fso As FileSystemObject
    Dim tso As TextStream
    Dim result As String
    Dim fpath As String
       
    fpath = MFunctions.GetDBPath & FName
    Set fso = CreateObject("Scripting.FileSystemObject")
    Set tso = fso.OpenTextFile(fpath, ForReading)
    result = tso.ReadLine()
    ReadFile = result
PROC_EXIT:
    Exit Function
PROC_ERR:
    MsgBox Err.Description
    Resume PROC_EXIT
   
End Function

I also got an error for the declaration:

Dim fso as FileSystemObject

Thanks

I don't find that reference. I tried Microsoft Script 1.0 and Microsoft Scriptlet but still ge the same compile error for Chr()

Almost certainly a Reference issue. You might try unchecking a reference, then closing the REf dialog, reopen it and re-check that reference.

You should also try a Debug - Compile (from the VBA Editor window). Fix any errors you find there, and continue doing that until the Compile menuitem is disabled.

Well instead of adding the reference, you could use late binding like so:

Dim fso As Object
Dim fsoStream As Object
'initialise the FileSystemObject
Set fso = CreateObject("Scripting.FileSystemObject")