Is it possible to open one ms access database from another ms database?

Check, and then double-check that the path and filename in

 OpenAnotherDb "C:\Users\Owner\Documents\EMS\Synth16\Access\emscomdb\square_pocket.mdb"

are absolutely correct.

Hans' suggestion is a good one but sometimes there are issues (security warnings that pop up) with using hyperlinks, so if you run into that issue, you can use this code instead if you want:

Function OpenAnotherDb(FileName As String, Optional PWD As String)

      Dim objAcc As Object

      Set objAcc = CreateObject("Access.Application")

      If Len(PWD) > 0 Then

          objAcc.OpenCurrentDatabase(FileName, , PWD)

      Else

          objAcc.OpenCurrentDatabase(FileName)

      End If

      objAcc.Visible = True

      objAcc.UserControl = True

     Set objAcc = Nothing

End Function

So you can put that into a standard module and name the module (if it isn't an existing one) something OTHER than the name of this function.  Then you can just call it like:

OpenAnotherDb \\ServerName\ShareName\Folder\MyDb.accdb

and if it has a password set on it (not User Level Security but just a database password) you can use:

OpenAnotherDb \\ServerName\ShareName\Folder\MyDb.accdb, "YourPasswordHere"

The part of objAcc.UserControl = True is the part that releases it from the control of the database which opened it so you can then set the object to nothing but the database will remain open.