Dear Florian,
Could it be that you only have spots in the center of your image and that XDS
is trying to process a lot of image area with only background in it? In this
case it will try to build profiles from non-existing reflections and start to
complain. The resulting bad data may cause scala to crash.
Look in the XDS.INP file for an INCLUDE_RESOLUTION_RANGE keyword and set it to
some sensible value with a high resolution cut-off of say 5 or 6 Å. This should
solve your problem.
Best,
HErman
________________________________
From: CCP4 bulletin board [mailto:CCP4BB@JISCMAIL.AC.UK] On Behalf Of
Florian Schmitzberger
Sent: Thursday, March 08, 2012 3:49 PM
To: CCP4BB@JISCMAIL.AC.UK
Subject: [ccp4bb] xds - problem with reference profile
Dear All,
I am getting a warning message in XDS I have not seen before, when
trying to integrate a low resolution (~ 7 A) dataset.
!!! WARNING !!! REFERENCE PROFILE # 1 IS EMPTY.
THE AVERAGE PROFILE IN THIS BATCH IS USED INSTEAD.
and so forth for the other reference profiles.
Indexing works alright with XDS; with likely point group C2. Scaling
the data integrated with XDS, with Scala fails; apparently most of the
reflections are rejected.
What are probable causes for the above error message?
Cheers,
Florian
