Logarithmic errors between the predicted ice compositions by the different models of UCLCHEM for A_V = 60 mag with T_dust = 14 K. Errors for only the H₂O column densities are indicated with blue rhombus, while black squares mark the errors calculated with the abundances with respect to water, both superimposed to the bars that represent the models in previous figures. Error bars correspond to 3σ.