Hi Edward, I hope you have some time to take a look at this. I have a data set at two fields. I used relax for fitting the data, but when and run the full_analysis script, after the software starts the grid search I get the following error message Traceback (most recent call last): File "/soft/group/relax/relax-1.3.4/relax", line 418, in ? Relax() File "/soft/group/relax/relax-1.3.4/relax", line 127, in __init__ self.interpreter.run(self.script_file) File "/soft/group/relax/relax-1.3.4/prompt/interpreter.py", line 276, in run return run_script(intro=self.__intro_string, local=self.local, script_file=script_file, quit=self.__quit_flag, show_script=self.__show_script, raise_relax_error=self.__raise_relax_error) File "/soft/group/relax/relax-1.3.4/prompt/interpreter.py", line 537, in run_script return console.interact(intro, local, script_file, quit, show_script=show_script, raise_relax_error=raise_relax_error) File "/soft/group/relax/relax-1.3.4/prompt/interpreter.py", line 433, in interact_script execfile(script_file, local) File "full_analysis_markup.py", line 764, in ? Main(self.relax) File "full_analysis_markup.py", line 226, in __init__ self.multi_model(local_tm=True) File "full_analysis_markup.py", line 755, in multi_model grid_search(inc=GRID_INC) File "/soft/group/relax/relax-1.3.4/prompt/minimisation.py", line 156, in grid_search minimise.grid_search(lower=lower, upper=upper, inc=inc, constraints=constraints, verbosity=verbosity) File "/soft/group/relax/relax-1.3.4/generic_fns/minimise.py", line 191, in grid_search grid_search(lower=lower, upper=upper, inc=inc, constraints=constraints, verbosity=verbosity) File "/soft/group/relax/relax-1.3.4/specific_fns/model_free/mf_minimise.py", line 479, in grid_search self.minimise(min_algor='grid', lower=lower, upper=upper, inc=inc, constraints=constraints, verbosity=verbosity, sim_index=sim_index) File "/soft/group/relax/relax-1.3.4/specific_fns/model_free/mf_minimise.py", line 789, in minimise model_type = self.determine_model_type() File "/soft/group/relax/relax-1.3.4/specific_fns/model_free/main.py", line 1015, in determine_model_type if cdp.diff_tensor.fixed: AttributeError: 'PipeContainer' object has no attribute 'diff_tensor' Checking the mailing archive I saw that Tiago Pais got the same error message last year. That time you suggested him to use a script containing a markup: http://svn.gna.org/viewcvs/relax/1.3/sample_scripts/full_analysis.py?rev=9794&view=markup ( The complete answer was: Re: Error when running full_analysis.py script Edward d'Auvergne Tue, 27 Oct 2009 03:02:16 -0700 Dear Tiago, This is a hard one to catch. I have just added a function to this script to check the validity of the user variables (http://svn.gna.org/viewcvs/relax/1.3/sample_scripts/full_analysis.py?rev=9794&view=markup). This should give better error messages specifically identifying the problem. For this second issue you are having, it is a little hard to see what the problem is. Would you be able to supply a little more information. For example the version of relax you are using, the full error message, how you have executed the full_analysis.py script and at what stage you are up to, etc. With more information, I should be able to track down the issue. Cheers, Edward ) The traceback I showed to you above is coming from running that script, I got the same error message when I run the canonical full_analysis script. I'm running relax 1.3.4 in RHEL distribution 5.1.19.6, kernel /vmlinuz 2.6.18-128.1.10.e15 It will be nice if you can help me with this Best regards Daniel Dr. Daniel Pérez Institut für Molekularbiologie und Biophysik Schafmattstrasse 20 ETH-Hönggerberg, HPK G 5 CH-8093 Zürich Phone: +41 44 633 25 37 E-mail: daniel.perez@xxxxxxxxxxxxxxxx