Error code 32775 - CTcpSocketOwner issue on Beckhoff PLC

Question

We get an error code 32775 when connecting our laptop to a Beckhoff PLC.

Error code stats 'TIsConnect failed: 'Target has rejected connection'

32775 error code in twincat

At that time, a route was already set up between the client's PLC and our laptop via a static IP address.

The error seems to occur when the system is put into Run mode but not 100% sure.

We have been in contact with the local Beckhoff support team but they don't have a clue.

We did 2 experiments

• My colleague connected with his laptop and he can access and build on the PLC
• I can access and build on any other Beckhoff PLC we have.

Some experienced something similar?

Best regards, Mathieu