Hi Jim,
do you have any chance to share with us the full stack trace?
It would be useful to better understand the origin of this error.
Moreover, using that Tomcat version, I would take a look at the tip provided at [1]. (Not sure if this is your case but it could be that the plugins are deregistered and therefore geoserver is unable to find a proper reader/stream)

Please, let us know.
Regards,
Daniele

[1]: http://geo-solutions.blogspot.com/2010/05/fix-geotools-and-geoserver-not-able-to.html


On Tue, Aug 30, 2011 at 3:29 AM, Jim White <jbw2003@earthlink.net> wrote:
I am unable to add a store for ImagePyramid. I get the error:

 Could not list layers for this store, an error occurred retrieving
them: null

geoserver 2.1-RC5
Red Hat 5
tomcat-6.0.33

Jim White

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Ing. Daniele Romagnoli
GeoSolutions S.A.S.
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