--- trunk/src/perturbations/UniformGradient.cpp 2014/11/03 16:49:03 2034 +++ trunk/src/perturbations/UniformGradient.cpp 2014/12/11 16:16:43 2047 @@ -119,6 +119,7 @@ namespace OpenMD { Grad_(2,2) = 2.0 * (a_.z()*b_.z() - cpsi_ / 3.0); Grad_ *= g_ / 2.0; + } else { if (!haveA) { sprintf(painCave.errMsg,