Somehow you have a J Engine from an earlier beta. It doesn't support
the u. primitive, which is new.
Henry Rich
On 8/27/2019 10:29 AM, Mike Powell wrote:
Try
load'math/calculus'
+: deriv_jcalculus_ 1
I have installed J901 beta and start J with jqt.app just fine. I’ve used the
Package Manager to install math/calculus (three times):
Updating server catalog...
Done.
Installing 1 package of size 6.4 KB
Downloading math/calculus...
Installing math/calculus...
Done.
Then from the jqt window, I get:
load'math/calculus'
|spelling error
| ufix =. u. f.
| ^
| deriv=:2 :0
|[-28] /applications/j901/addons/math/calculus/calculus.ijs
Mike
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