this statement is included in the log file when I do frequency calculations by gaussian 09

this warning can be neglected ?????

what this mean about the accuracy of enthalpy and other parameter ?????

the output is :

Atom 25 has atomic number 17 and mass 34.96885

Molecular mass: 698.55788 amu.

Principal axes and moments of inertia in atomic units:

1 2 3

Eigenvalues -- ******************************

X 0.99976 0.00000 -0.02175

Y 0.00000 1.00000 0.00000

Z 0.02175 0.00000 0.99976

This molecule is an asymmetric top.

Rotational symmetry number 1.

Warning -- assumption of classical behavior for rotation

may cause significant error

Rotational temperatures (Kelvin) 0.00639 0.00417 0.00340

Rotational constants (GHZ): 0.13324 0.08698 0.07086

Zero-point vibrational energy 369763.0 (Joules/Mol)

88.37547 (Kcal/Mol)

Warning -- explicit consideration of 33 degrees of freedom as

vibrations may cause significant error

Thank you