Dear All, I am using Relax ( version relax-1.3.5.GNU-Linux) to get relaxation curves from HSQC spectra. I have exported the data from analysis in Sparky format. After running for a few seconds i get he following error message 'List Index out of Range'. Below is a print screen of the problem: relax> spectrum.replicated(spectrum_ids=['T11000done', 'T110002done']) relax> spectrum.replicated(spectrum_ids=['T11200done', 'T112002done']) relax> spectrum.error_analysis() Intensity measure: Peak heights. Replicated spectra: Yes. All spectra replicated: Yes. Replicated spectra: ['T1010done', 'T10102done'] Standard deviation: 77677.6124466 Replicated spectra: ['T1020done', 'T10202done'] Standard deviation: 81714.9935075 Replicated spectra: ['T1030done', 'T10302done'] Standard deviation: 52174.0074096 Replicated spectra: ['T1050done', 'T10502done'] Standard deviation: 101149.864468 Replicated spectra: ['T1070done', 'T10702done'] Standard deviation: 59278.6902247 Replicated spectra: ['T1100done', 'T11002done'] Standard deviation: 41827.710636 Replicated spectra: ['T1150done', 'T11502done'] Standard deviation: 70130.6742832 Replicated spectra: ['T1200done', 'T12002done'] Standard deviation: 80696.9386138 Replicated spectra: ['T1300done', 'T13002done'] Standard deviation: 75574.7377343 Replicated spectra: ['T1400done', 'T14002done'] Standard deviation: 109708.032792 Replicated spectra: ['T1600done', 'T16002done'] Standard deviation: 96472.7940924 Replicated spectra: ['T1800done', 'T18002done'] Standard deviation: 78680.8879662 Replicated spectra: ['T11000done', 'T110002done'] Standard deviation: 263613.329907 Replicated spectra: ['T11200done', 'T112002done'] Traceback (most recent call last): File "/home/ms4225/programs/relax-1.3.5/relax", line 358, in <module> Relax() File "/home/ms4225/programs/relax-1.3.5/relax", line 126, in __init__ self.interpreter.run(self.script_file) File "/home/ms4225/programs/relax-1.3.5/prompt/interpreter.py", line 287, in run return run_script(intro=self.__intro_string, local=locals(), script_file=script_file, quit=self.__quit_flag, show_script=self.__show_script, raise_relax_error=self.__raise_relax_error) File "/home/ms4225/programs/relax-1.3.5/prompt/interpreter.py", line 533, in run_script return console.interact(intro, local, script_file, quit, show_script=show_script, raise_relax_error=raise_relax_error) File "/home/ms4225/programs/relax-1.3.5/prompt/interpreter.py", line 429, in interact_script execfile(script_file, local) File "R1_newLM.py", line 125, in <module> spectrum.error_analysis() File "/home/ms4225/programs/relax-1.3.5/prompt/spectrum.py", line 221, in error_analysis spectrum.error_analysis() File "/home/ms4225/programs/relax-1.3.5/generic_fns/spectrum.py", line 394, in error_analysis __errors_repl() File "/home/ms4225/programs/relax-1.3.5/generic_fns/spectrum.py", line 189, in __errors_repl ave_intensity = ave_intensity + spin.intensities[indices[j]] IndexError: list index out of range Could anyone point me in the direction of finding this error, as it the message seems a bit ambiguous? Many Thanks Leanne -- --