DDE23 and LSQNONLIN

Has anyone had any experience using these functions together? Can't seem to find any documentation/examples.

Thanks in advance

[Arvind Narayanan]

Here are the links to the documentation for both functions:

DDE23

LSQNONLIN

What is your use case? I guess it would be easier to just state your use-case and the issue that you are facing. That would incite a good response!