[ccp4bb]: FIND_CONTACT_WITH_BRICKING error in TLS refinement

[Miles Pufall]

Hi, I am running a TLS refinement in REFMAC5 on a protein:DNA complex in space group C2 with 4 zincs in it.  I generated my tls file in both Create/Edit TLS and through TLSMD.  Refining failed in both cases, generating the following message: CGMAT cycle number =      1 Too many symmetry related atoms Check symmetry and cell dimensions ===> Error: FIND_CONTACT_WITH_BRICKING failed This may be unrelated, but I have been concerned about some twinning, as refinement for 1.8 angstrom data has only left around Rfree/R of 29/26.  Checks for twinning using CNS and Xtriage (Phenix) have concluded that there the data is probably not twinned or pseudo translated.  I've been unable to run Detwin as there is no standard transformation available for the C2 spacegroup in my CCP4. Any thoughts? Thanks, Miles Miles Pufall, PhD University of California-San Francisco 600 16th St., Rm S574, Box 2280 San Francisco, CA 94107 (415)476-4480