Debug jcoupling determination bug ... (low priority)

[lpatiny]

In rare cases (related to .nmrium file ?) the range picking debug does not show the peaks.

600_cdcl3_full.nmrium.zip

If you take this file and in the 1H make a manual range picking while pressing 'ALT' key you see the debug but the vertical scale seems to be 0 and we don't see the deconvoluted peaks.