Enumerations: PropertyAccessException

I get PropertyAccessException on enumeration access: see at bottom

getAllListingGroupNames is a public method.

The jar file that contains that class is in .../WEB-INF/lib

The class is public with the annotation @Stateless

I get this error when I validate the enumeration file.

The Guided Rule editor sees ListingGroupBean and allListingGroupNames as one of its fields, but is that because I have it uploaded to the artifact repository? Do you need to upload jars that are already in .../WEB-INF/lib?

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src/exception
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1. | 'ListingGroupxxx.name' : ['a','b','c']
2. | 'ListingGroup.name' : (new
com.xyz.mgmt.listing.ListingGroupBean()).getAllListingGroupNames()

Unable to load enumeration data.

[Error: unable to invoke method: getAllListingGroupNames] [Near :

{... ng.ListingGroupBean()).getAllListingGroupNames() ] ....}

] ^ [Line: 2,
Column: 74]

Error type: org.mvel2.PropertyAccessException