Hello,ntype (rpgetvar 'species/save-gradients?) and see if you get true (#t) or not ... nAlso if you want to recall gradient of any variable, save it to C_UDSI and then you can recall the gradient by C_UDSI_G ... don't forget to disable solving the UDS associated with this variable.nAnd for the temperature, yes you can use the temperature gradient ... C_T_G(c,t)nn