If you have uploaded a GEDCOM file to GeneaNet, click 'Update' in the 'Online Family Tree' tab at the top of the screen, then click 'Check Family Tree' in the left sidebar.

If you have created your GeneaNet family tree from scratch, click 'GeneWeb > Configure' in the 'Online Family Tree' tab at the top of the screen, then click 'Check Family Tree' in the left sidebar.

This will automatically and instantly create the list of errors found in your family tree.

To ignore some errors, just click the red cross icon in the right column (critical errors cannot be ignored).

After any update of your family tree, you can check it again by clicking the 'Resume' button at the bottom of the list.

You can restore ignored errors so they will be listed again: click the green arrow icon in the right column.