Dear Peter, it seems to me that you are having trouble with f2mtz and not with ctruncate, so I am confused by the subject. Can you please post - the error message, - the first couple of lines of the hkl-file you are trying to import (including one or two reflections which are flagged for Rfree), - the version of ccp4 you are using - whether you are doing the conversion from the GUI or the command line - if the latter, please also post the script you are using. Cheers, Tim On Wed, Oct 27, 2010 at 09:14:36PM -0400, Peter Chan wrote: > > Hello, > > I've been struggling with F2MTZ and importing my hkl file into mtz by 'keeping existing freeR data'. I keep getting the error "Problem with FREE column in input file. All flags apparently identical. Check input file." > > At the end of the day, it appears that this only happens in ctruncate and not in the old_truncate instead of ctruncate. Has anyone experienced a similar problem? > > Peter > -- -- Tim Gruene Institut fuer anorganische Chemie Tammannstr. 4 D-37077 Goettingen phone: +49 (0)551 39 22149 GPG Key ID = A46BEE1A