How to Increase the Sewing Tolerance in Autogrid
 

I'm designing a Radial Diffuser for which I created my own Hub, shroud and Blade in Catia V5 and then imported it to Autogrid Version 11.2. After defining the Leading and the Trailing edge of the Blade I ran the Row Wizard for which i got a warning saying - "Blade Surfaces Sheet Body Not Correctly Defined Try to Increase the Sewing Tolerance Manually in the Blade/Check Geometry Box
Or check the Units in the Geometry Definition Box".

What are your units of the geometry and the maximum size?
Did you try increasing the tolerance in the Blade/Check geometry box?