Hi hydrix!
You can get the error of the first parameter of a fitting procedure by:
double dblErrorFirstParameter = NLSF.e1;
I don't know, if you are still using that feature, but you can use
using NLSF = LabTalk.NLSF;
to easier access the LabTalk commands like
NLSF.xBegin
and so on...
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:-Dipl.-Phys. Dominik Paulkowski
Fraunhofer Institute for Surface Engineering and Thin Films (IST)
Braunschweig
Germany