Database version: Informix-12.10

ADS version: ads-windows-x86-14.0-rc-44

Connect Informix

Create simple index

CREATE INDEX informix.TEST_ALTER_INDEX ON informix.nilesh(col1, col3, col2)

Go to Index Tree nodes right click ->Select Index->Right click on Index->Select Alter Index->Go to Options Tab->Both Unique and Clustered options are Disabled.

Now open Query analyzer window->write Alter query for Index->

ALTER INDEX informix.index2 TO CLUSTER;

Execute this query->it alters Index successfully.