Oncheck returns "Non vanilla index. data crosschecking not enabled"

Technote (FAQ)


You are running 'oncheck -cI' command and for certain indexes oncheck returns "Non vanilla index. data crosschecking not enabled". Why does it happen?


It happens because oncheck cannot validate functional indexes or indexes built on columns with opaque data types, including LVARCHAR. It is a known limitation of the oncheck utility.

Document information

More support for:

Informix Servers

Software version:

11.5, 11.7, 12.1

Operating system(s):

AIX, HP-UX, Linux, OS X, Solaris, Windows

Software edition:

Developer, Enterprise, Express, Growth, Hypervisor, Innovator, Ultimate, Workgroup

Reference #:


Modified date:


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