If it’s the first time you are running UDF of RTD, try running a simple example that only returns a value, to check that the API works in your environment. {%%endnote%}}

Writing applicative UDF/RTD:

1. Comment the space API calls inside UDF/RTD code and make it return constant values.
2. Create a console or Win-form application that hosts the UDF/RTD DLL and debug it directly to solve the function implementation problems.