Hi, Just so you know, due to the fix for bug #22961 (https://gna.org/bugs/?22961), the failure of relaxation data loading with the message "IndexError: list index out of range", I plan on soon release a new relax version with this fix. I don't know why relax users have not reported this problem before, as it is likely to have been encountered a few times. Maybe the solution would be to catch all errors, skip the RelaxErrors so they proceed as normal, and then create a system for automatic bug submission? This would be a radical and highly disruptive change though. A different solution would be required for each UI (prompt, script, and graphical). The hard part would be to interface with the Gna! infrastructure. This may make automation impossible. Therefore maybe a set of instructions for bug submission should be presented to the user. Some ideas for the text would be: - "An unidentified error has been encountered." - Please create a bug report using the link https://gna.org/bugs/?func=additem&group=relax. - Copy and paste the entirety of the error message. - Attach the log file if one was created (or copy and paste the relax output or rerun relax with the --log or --tee option), compressing if it is a large file. - Ideally create truncated input data files for 1 or 2 spins, slightly randomising the data and changing file names for privacy, and attach those files. - Attach a script file, if it exists. - If the attached data and script files are sufficient to reproduce the bug, a solution can usually be found within 5 to 10 minutes. - Run 'relax --info --tee relax_info.log' and attach the relax_info.log file to the report. These are just some ideas for the future. Regards, Edward