While trying to add harmonic restraints to a 603 aa structure, I was unable to input all the necessary restraints because of a limit on the string length. A previous post suggested recompiling "PARAMETER (STRING_SIZE=264) in the file "cns.inc" would appear to be responsible. Redimension and recompile. 264 seems rather small." Has anyone had any program issues after recompiling with a larger string size? Thanks! -Ian