  In a recent paper, Shetty et al [Phys. Rev. C 70, 011601R (2004)] reported
that the experimental isoscaling parameters aexp from several reactions favor
the Gogny-AS effective nucleon-nucleon interaction over Gogny interaction. This
conclusion is reached by comparing data to Antisymmetrized Molecular Dynamics
(AMD) predictions for collisions of calcium isotopes. The specific simulations
produce excited fragments at t=300 fm/c before they decay. Sequential decay
calculations of the excited fragments suggest that the isoscaling parameter
apri from the AMD calculations could be reduced by as much as 50%. We also
explore the linear equation used to relate other reactions to the AMD
calculations for Ca+Ca collisions. The uncertainty in the relation is larger
than the differences between the predicted apri when using Gogny and Gogny-AS
interactions.
