*** For details on how to be removed from this list visit the *** *** CCP4 home page http://www.dl.ac.uk/CCP/CCP4/main.html *** Dear ccp4 My problem arose from editing the pdb under NT which added the dreaded ^M. Once I had stripped this off using the CNS utility dos2unix my problem was solved. The message in the log file proved too cryptic for me. many thanks to all who replied. Mike