Hi Cristian, You tell us you are using a particular Linux distribution. I doubt this matters – if you got as far as Larix running, then the OS-specific or distribution-specific challenges are almost all solved. But then you also say that you are opening a ".xlsx" data file. Are you really opening an Excel spreadsheet file? I can certainly believe that will lead to problems! In general, when asking about an error reading in a data file, it is probably a good idea to assume that you should attach an example file that shows the problem. ________________________________ From: Ifeffit on behalf of Chris Vijeu Sent: Sunday, February 18, 2024 4:22 AM To: ifeffit@millenia.cars.aps.anl.gov Subject: [Ifeffit] Larix.desktop on Arch Linux AttributeError: 'list' object has no attribute 'shape' This Message Is From an External Sender This message came from outside your organization. Hello, So I recently installed Larch on two different machines running two different distributions of Arch (Manjaro and EndeavourOS). When I am starting Larix.desktop from the terminal and open a .xlsx data file with two columns (energy and intensity), I get the following error: Traceback (most recent call last): File "/home/chris/xraylarch/lib/python3.11/site-packages/larch/wxxas/xasgui.py", line 1162, in onReadDialog self.onRead(path) File "/home/chris/xraylarch/lib/python3.11/site-packages/larch/wxxas/xasgui.py", line 1187, in onRead self.show_subframe('readfile', ColumnDataFileFrame, filename=path, File "/home/chris/xraylarch/lib/python3.11/site-packages/larch/wxxas/xasgui.py", line 1114, in show_subframe self.subframes[name] = frameclass(self, **opts) ^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/chris/xraylarch/lib/python3.11/site-packages/larch/wxlib/columnframe.py", line 870, in __init__ self.set_energy_units() File "/home/chris/xraylarch/lib/python3.11/site-packages/larch/wxlib/columnframe.py", line 1208, in set_energy_units ncol, npts = workgroup.data.shape ^^^^^^^^^^^^^^^^^^^^ AttributeError: 'list' object has no attribute 'shape' I haven't modified any of the respective files at all. This is what the programme came as. Chris Cristian Vijeu, Postgraduate PhD Student, Materials for Energy and Electronics Division of Natural Sciences