Error "[A30156] Cannot register Java native calls for the AOM Node interface"

Getting "[A30156] Cannot register Java native calls for the AOM Node interface" error and there is no aom.jar in custom folder. I tired "eval option('javaclasspath')" in console but not success. Is there any way to debug it?

Environment: Arbortext 6.1 and Java 1.6

Thanks in advance,

Bala