How to carry out geometric clean up in Ansys Designmodeler
Open your DesignModeler and go to details view. Press the drop down arrow at "Find Faults Now" to yes. It should show you the errors than choose the "Repair Method" to Automatic and press "generate" on the top toolbar. You can also hit the tool bottom and go straight to repair, where you do your iterations on the single geometrical features (holes, lines, edges...) Remember choose the right repair method for your application.
Thank you Andreas, it worked fine.. Since there are numerous repair options available we need to explore all the option to take the advantage of these repair features.
Make sure not to create unneccessary artificial problems, like sharp edges. They will create singularities where stresses go infinit.