You can find overlapping links in a schematic.

Click the Schematic Trace Task drop-down list on the Schematic Network Analyst toolbar and click Find Overlapping Links.

Click the Trace Task Properties button to open the Schematic Trace Task Properties dialog box. Click the Find Overlapping Links tab and uncheck the Select links check box.

Click the Highlight tab, choose a line color, then type a line width to highlight the loop. Click OK.