TypeDescriptor with Name '{0}' (found in Parameter with Name '{1}', Method with Name '{2}', Entity (External Content Type) ...

TypeDescriptor with Name '{0}' (found in Parameter with Name '{1}', Method with Name '{2}', Entity (External Content Type) with Name '{3}' and Version '{4}' in Namespace '{5}') refers to an Association with Name '{6}' which is supposed to exist on Entity with Name '{7}' in Namespace '{8}'. This Association cannot be found.