SPACI score report for 1iwo in ASTRAL 1.61:

PDB Entry: 1iwo
SPACI score: 0.17
AEROSPACI score: 0.17

Experiment type: XRAY
Resolution: 3.1
R-factor: 0.237
PCK1 PROCHECK Ramachandran: 1
PCK2 PROCHECK Chi-1 angle: 2
PCK3 PROCHECK H-bonds: 3
WCK1 WHAT_CHECK Packing: -2.814
WCK2 WHAT_CHECK Ramachandran: -4.583
WCK3 WHAT_CHECK Chi angles: -2.431
WCK4 WHAT_CHECK Backbone: -1.185

Note: Here are links to pages about PROCHECK and WHAT_CHECK.

Here is the full WHAT_CHECK report on this protein (linked from the WHAT_CHECK site).