2D NMR FID: standalone .dx opens on app.nmrium.com but fails on nmrium.nmrxiv.org and in the React wrapper (zip works)

[Nicolass67]

Description

We have a 2D NMR FID dataset that behaves differently depending on how it is provided to NMRium.

What works

• The standalone .dx file opens correctly on https://app.nmrium.com/
• The .zip file (containing the same data) opens correctly:
  • on https://nmrium.nmrxiv.org/
  • in the NMRium embedded in Chemotion (via the React wrapper)

What fails

• The same standalone .dx file does not open:
  • on https://nmrium.nmrxiv.org/
  • in the NMRium embedded in Chemotion (React wrapper)

Steps to reproduce

• Open NMRium (either nmrium.nmrxiv.org or embedded via the React wrapper).
• Load the standalone .dx file.
• Observe that it fails to open (while the same data in .zip works).

Expected behavior

• Standalone .dx should load the same way as on app.nmrium.com, and the same way as the .zip variant.

Actual behavior

• Standalone .dx fails to load on nmrium.nmrxiv.org and via the React wrapper, while .zip works.

[hamed-musallam]

@Nicolass67 @vcnainala

I tried to reproduce the issue following your steps, but it works correctly when I drag and drop a JCAMP file (.jdx). Please take a look at the short video below. Did I miss something, or are my reproduction steps incorrect? Could you confirm?

Screen.Recording.2026-02-06.at.17.14.16.mov