Symptom
When connecting to a Lock from Key software, an error message about "pniopcac.exe" is displayed.
Cause
This is a specific problem that may occur after Key software update in environments having Siemens software installed.
Recommended action
Switch “PROFINET IO RT-Protocol V2.x” off from the VPN adapter:
- Open properties of the Tosibox TAP-Windows adapter
- deselect checkbox of following protocol: PROFINET IO RT-Protocol V2.x
- Reconnect to Lock, warnings should not appear anymore.
If this doesn’t help, see more solutions on Siemens support site