ChrisAnderson

Herbert, Thanks for the reply. I'll look into it today and post back with results. Chris

Cross-post disclosure: http://forums.ni.com/ni/board/message?board.id=170&thread.id=428823 I am trying to fit some rectangular complex data (S11 data for those with network analyzers) to a model using the Constrained Nonlinear Curve Fit vi in LabVIEW using the trust-region algorithm. I'm already doing this in Matlab after I've gathered and saved all my data, but would like to bring it into LabVIEW. (Doing the fitting in Matlab has helped me become more proficient in it, distributing and installing two run-times and the executables has become an unnecessary pain.) However, the VI only accepts double, causing me to lose all of the phase information I need to do the extraction. Is there any way to send CDB data or will I have to attempt to rewrite the VI and its sub-VIs, replacing DBL with CDB? Thanks, Chris