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In Mathcad Prime 3.1 has come out this inexplicable error. How to correct it?
Hi all
In Mathcad Prime 3.1 has come out this inexplicable error. How to correct it? it is enclosed in the box in black, of the following figure.
Thk.
In your definition of F.s, and its usage in the three partial deriatives, each x, y and z are explicitly labelled as 'variable' but the variable to differentiate to (the x, y and z in dx, dy and dz) are 'automatic'. This may make the variable to differentiate to different from the arguments to the F.s function, hence they are treated as constants.
If you change the x, y and z in dx, dy and dz respectively to label type 'variable' it should work.
In the lowest box all x y and z are 'automatic', so that works as expected.
Luc
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