We resolved this by installing the "CODESYS Control for Raspberry Pi" version 4.0.0 package, then updating the device in the project to that version.
I am having trouble upgrading a project from Codesys 3.5 SP12 Patch 4 to Codesys 3.5 SP16 Patch 3. I have both versions of the development environment installed on my PC. I can reproduce the problem with a simple example project created as follows: Create a new "standard project", device = CODESYS Control for Raspberry Pi SL, structured text Right-click the Device node, click Add Device, select Fieldbuses->Ethernet Adapter->Ethernet Build: No errors Right-click Ethernet node, click Add Device, select...