Hello,
I´m trying to run the 6-dimensional fft example that is in the "Fast Fourier 
Transform" lab in the new version of J (8.0.7). In 8.0.6 it works, I tried to 
verify any obvious difference between versions but found none. The code follows:
A=: j./ ?. 1 + i. 2 3 4 5 6 7 8
$A
$B=: fftw A
$C=: ifftw B
+/ , clean A - C

It stops silently in the $B definition calling the fftw verb. Strangely the 
previous calls to it were OK.

JVERSION

Engine: j807/j64/windows

Release: commercial/2018-10-05T10:39:42

Library: 8.07.19

Qt IDE: 1.7.9s/5.9.6

Platform: Win 64

Installer: J807 install

InstallPath: c:/users/weierstrass/j64-807

Thanks
Rafael

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