OPCUA Errors

[AndreyKl4]

Hi All,

can smb please explain me in what way is correct to represent Errors in OPCUA Methods. For Example:

I have two InputArguments x,y and in Server Method callback i want to divide them z = x/y and I want to raise opcua error in Client if InputArgument y=0 and Method Call should not be succeeded. Unfortunately, i didn't find a way to declare opcua erros in method callback....

Thanks in Advance!

Andrey

[AndreasHeine]

https://reference.opcfoundation.org/v104/Core/docs/Part4/5.11.2/

StatusCode of the Method executed in the server. This StatusCode is set to the Bad_InvalidArgument StatusCode if at least one input argument broke a constraint (e.g. wrong data type, value out of range).
This StatusCode is set to a bad StatusCode if the Method execution failed in the server, e.g. based on an exception.

return ua.StatusCode(ua.status_codes.StatusCodes.BadInvalidArgument)

you can also return a instance of "CallMethodResult":

python-opcua/opcua/common/methods.py

Line 72 in 1cca33d

elif isinstance(result, ua.CallMethodResult):

python-opcua/opcua/ua/uaprotocol_auto.py

Line 8316 in 1cca33d

class CallMethodResult(FrozenClass):

[oroulet]

The main method is supposed to be to raise the UaError

raise ua.errors.BadInvalidArgument or similar

[AndreyKl4]

@oroulet @AndreasHeine Thanks a lot for the quick and very helpful answers!!!