Dear Peter Blaha et al., SRC_lapw0/poissn.f contains an algorithm for calculating CLM by V and its 1st and 2nd derivatives. However, this subroutine is not called during a W2k calculation with case.in0 and option R2V. In which directory/routine to find the working algorithm for CLM by V ? I've not found out despite extensive "grep" searches. Best regards, John Rundgren