The server and 2 workstations run Windows 10. Another 2 workstations run Windows 7 and Windows 8 respectively. After the Windows 10 update I get error 94 from the 2 older workstations. The new workstations work 100%.

We took all the steps in the Error code 94 bulletin (opening ports in the Firewall etc) on the workstations and the server. We disabled anti-virus and opened the firewalls completely. we re-installed Pervasive and Repaired Pastel Partner on the workstations. No joy.