MrAnimaniac

> Could you try with tdata = np.array([0, 10, 10, 26, 44, 70, 120]) and t_initial=10? yields to the same error. > What happens if you have no repeated values?...

While writing the minimal example I realized that the error occurs if ` conditions` of `radis.calc_spectrum()` contain `‘Tgas’` as well as `‘Trot’`. More precisely - and as can be observed...

At least the latest version of the Windows installer https://github.com/Bill-Stewart/SyncthingWindowsSetup/ supplies two exe-files: - `syncthing.exe` - `stctl.exe` Using the later solves the issue.