Hello, I’ve tried using Codesys V3.5 SP19, Control Win V3x64. I’ve found, that all enumeration variables appeared as Int32 on OPCUA client, irrespectively from explicit data type declaration. 64-bit enumeration variables with value, above 32bit limit, are read failed with BadOutOfRange error… The Control Win runtime itself working without problem (however, in my case control from client is broken, as I had enumeration of BYTE data type, now should be treated as DINT).