Question: Tickmarks in plot3d



in Maple 12 (worksheet mode), the tickmark-option does not work: I enter in a plot3d-command (this command works otherwise) axis[3]=[tickmarks=5] in order to get 5 divisions on the z-axis.


The error message is "Error, (in plot3d) incorrect value for option gridlines: 5".


The workaround of tickmarks=[5,5,5] works. Other axis-options work, e. g. axis[3]=[color=green] .


Any help on that will be appreciated.


Many thanks in advance,


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