Adam, I am not compiling CCP4, just refmac. IIUC, all that sourcing ccp4.setup does is it sets $CLIB for refmac makefile to find libccp4c and libccp4f. And presumably lapack and libblas, but that's a separate issue. On Thu, 2013-02-28 at 10:28 +0000, Adam Ralph wrote: > Hi Ed, > > > It looks as though you have not sourced $CCP4/include/ccp4.setup. > This needs to be customized and sourced before you configure and make > CCP4. > > > Adam > -- Bullseye! Excellent shot, Maurice. Julian, King of Lemurs.