First, I wanted to thank for creating such a wonderful program for mode-free analysis. Using the recent version with GUI, I was able to get T1, T2 and NOE values without much effort. But I am not able to proceed further to do the mode-free analysis because the relax needs more than one filed frequency data. My problem is that I have data from only one frequency and I do not know the sequence of steps involved in running the relax. I learned from the forum that this has been asked several times and answered several times. I am also aware of problems with single frequency data. But I have to work with only one frequency data for the time being. Even after reading the forum and well-detailed manual, I am not able to understand what are the steps I should be doing to get model-free data. My understanding so far is i) first run mf-multimodel.py and then ii) modesel.py after removing the models M4 to M9. It would be nice if some one post the details of how to use relax for single frequency data, if they were successful already running the calculations. I would like to connect with those people who are in my situation and created successful code for running relax. Thanks, Dhanas Muthu