I think this comes from the same issue as found in that other thread. Did you try replacing the first 2 lines with the code I showed in that thread?(or jmm:plot_reactor
(setq jmm:plot_reactor (cadr (car (vlr-reactors :vlr-editor-reactor))))
(setq jmm:plot_reactor (vlr-editor-reactor nil '((:vlr-commandEnded . jmm:cmdEnd)))))
That, I believe, seemed to solve it.