This script uses DRC to find layout connectivity issues such as rats lines and gaps in layouts. Open the layout you want to check, make it the active window and then run the script.

In the example below, the two microstrip lines are not completely connected. The second picture shows the result after running the script. Running this script will require the Physical Verification feature in your license file.

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See Preventing Layout Problems for information on how to prevent gaps in layout and other common layout problems.