Hi,
difficult to diagnose this at a distance. I’m obviously assuming that you correctly selected a 3D window in the PickAndAssign Settings and that your HSQC has got some peaks with NmrAtoms assigned to them.
Something I came across just now when investigating this thread is that the NmrAtoms in questions didn’t have an isotopeCode and that stopped the navigation from working. So perhaps worth checking that your NmrAtoms have isotopeCodes?
Vicky