The DRC GUI report gives a (PLCK-12) warning.
The message given in the "Details" tab in the "Violation Properties" window of this violation is similar to the following:
There is no information about the object names that are causing the violation.
How can I tell which cells are involved in the issue?
The message given in the GUI DRC report does not provide enough detail.
More details can be found in the DRC report, including the cell names.
You can generate the text DRC report by leaving the location and the file name in the "Output file" blank when you run "Report DRC...":