[ccp4bb] Strange SFALL error

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From: Kay Diederichs Kay {- dot -} Diederichs {- at -} UNI-KONSTANZ {- dot -} DE
Date: 2008-02-14

Subject: Strange SFALL error
From: Dirk Kostrewa kostrewa {- at -} LMB {- dot -} UNI-MUENCHEN {- dot -} DE
Date: 2008-02-14

Dear CCP4ers,

I've created an artificial map in C2 with MAPMAN and made sure that
the axis order and sampling is consistent with SFALL, which I want to
use for calculating structure factors from this map. However, SFALL
(MODE SFCALC MAPIN) fails with the rather obscure error message:
"SFALL: *** You are unable to refine this Spacegroup!! ***" I've
never encountered this error message before - what does this mean and
how can I convince SFALL to do the Fourier transformation?
The articifial map was made by placing single atoms in a C2 cell
including all symmetry equivalent atoms, creating a mask around these
atoms with MAMA and setting space group and axis order in MAPMAN
(axis order ZXY). I used MAPMASK to limit this map to X=0,1, Y=0,0.5,
Z=0,1 as required by SFALL.

Best regards,

Dirk.

*******************************************************
Dirk Kostrewa
Gene Center, A 5.07
Ludwig-Maximilians-University
Feodor-Lynen-Str. 25
81377 Munich
Germany
Phone: +49-89-2180-76845
Fax: +49-89-2180-76999
E-mail: kostrewa@lmb.uni-muenchen.de
*******************************************************

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From: Kay Diederichs Kay {- dot -} Diederichs {- at -} UNI-KONSTANZ {- dot -} DE
Date: 2008-02-14