Investigate and determine why this happens.
Find out if it affects released branch 9.0.2 (get from bioviz.org).
Read user's guide Advanced Search documentation as background.

To repeat:

1) Click Advanced Search tab
2) Select PropertySearch, don't enter query string (leave text blank)
3) Click Search icon (magnifying glass button on right of text entry)

Observe exception:

14:51:37.494 ERROR c.a.genometry.thread.CThreadWorker - Comparison method violates its general contract!
java.lang.IllegalArgumentException: Comparison method violates its general contract!
at java.util.TimSort.mergeHi(TimSort.java:899) ~[na:1.8.0_192]
at java.util.TimSort.mergeAt(TimSort.java:516) ~[na:1.8.0_192]
at java.util.TimSort.mergeCollapse(TimSort.java:441) ~[na:1.8.0_192]
at java.util.TimSort.sort(TimSort.java:245) ~[na:1.8.0_192]
at java.util.Arrays.sort(Arrays.java:1512) ~[na:1.8.0_192]
at java.util.ArrayList.sort(ArrayList.java:1462) ~[na:1.8.0_192]
at java.util.Collections.sort(Collections.java:175) ~[na:1.8.0_192]
at com.affymetrix.igb.searchmodeidorprops.SearchModeIDOrProps.findLocalSyms(SearchModeIDOrProps.java:180) ~[na:na]
at com.affymetrix.igb.searchmodeidorprops.SearchModeIDOrProps.search(SearchModeIDOrProps.java:105) ~[na:na]
at com.affymetrix.igb.searchmodeidorprops.SearchModeID.search(SearchModeID.java:86) ~[na:na]
at com.affymetrix.igb.keywordsearch.KeyWordSearch.search(KeyWordSearch.java:65) ~[na:na]
at com.affymetrix.igb.search.SearchView$SearchAction$1.runInBackground(SearchView.java:175) ~[na:na]
at com.affymetrix.igb.search.SearchView$SearchAction$1.runInBackground(SearchView.java:155) ~[na:na]
at com.affymetrix.genometry.thread.CThreadWorker.doInBackground(CThreadWorker.java:73) ~[na:na]
at javax.swing.SwingWorker$1.call(SwingWorker.java:295) [na:1.8.0_192]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_192]
at javax.swing.SwingWorker.run(SwingWorker.java:334) [na:1.8.0_192]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_192]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_192]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_192]