Lucee 4.5 - error


I am attempting to migrate an ACF10 application to Lucee running
under Tomcat.

When the app attempts to execute this code:

<cfset wsNDC =

It throws the following error:

Lucee Error (java.lang.NoClassDefFoundError)
Message Could not initialize class
Cause java.lang.NoClassDefFoundError

Any ideas as to what the issue is - or where I could start looking?