I noticed on Windows 5.12rc1, that a finishing $ after plotdf stucks xMaxima even if in
multiple or separate plot mode:
(%i2) load("plotdf")$
(%i3) plotdf(exp(-x)+y,[trajectory_at,2,-0.1]); OK
(%o3)
(%i4) plotdf(exp(-x)+y,[trajectory_at,2,-0.1])$ now xMaxima has to be killed completely
Volker