Difference between async and sync-method: load_data_type_defintions does not work in sync-wrapper

[hsk0815]

Dear community,

i have custom datatypes in my opc server. If i take the client example and use the async-methode, every custom-node (enum, structure) will be created. If i use the sync-method, several exceptions are thrown like this for example for an enum:

asyncopcua.asyncua.ua.uaerrors._auto.BadAttributeIdInvalid: "The attribute is not supported for the specified Node."(BadAttributeIdInvalid)