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Re: [ccp4bb]: Error running FFT in alpha
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first off, what Alpha machine are you using. Previously we have had
reports of problems using fft on the XP1000, divide by zero in that case.
That seemed to have been caused by various arrays being overwritten,
although the problem was not fully tracked down.
Several solutions were found though.
1. use FFTBIG. This worked. It uses dynamic memory allocation.
2. increase the size of the working array, X. Set IDUM to 1000000. This
will work if the problem arises in the sorting routines by bypassing
the multiple passes.
3. turning off optimization seemed to also cure the problem. Could be
that it arose due code reordering. Warning: this leads to a large
Hope these suggestions help.
ps- anyone using a new Alpha have any further information?