IOP: Loading complex may throw BadNothingTodo exception if DataTypeDictionary nodes are not populated

[mregen]

Type of issue

• Bug
• Enhancement
• Compliance
• Question
• Help wanted

Current Behavior

The issue only applies if the client can not derive all datatypes from DataTypeDefinition and has to fall back to the DataTypeDictionaries.

Servers may chose to not populate the dictionaries in V1.04.
If the complex type client tries to fall back to dictionaries it can fail due to a BadNothingTodo exception, which should be skipped because it tries to read 0 nodes.

Expected Behavior

No response

Steps To Reproduce

Connect to a server which has no DataTypeDictionaries, but also doesn't expose all complex types in the DataTypeDefinition, which causes the client to fall back to read the dictionaries for the missing types.
Complex type loading fails due to the BadNothingTodo error.

Environment

- OS: any
- Environment: any
- Runtime: any
- Nuget Version: 1.5.374
- Component: client
- Server: Enapter sample server for the hydrogen industry
- Client: UA console client with option to read all datatypes

Anything else?

No response