ECCE gives no properties with ecce formatted nwchem output
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Gets Around
10:06:46 PM PDT - Wed, Jun 3rd 2015
I got frustrated with the inability to open gaussian 09 files in ECCE and ended up solving it (mostly):
http://verahill.blogspot.com.au/2015/06/610-importing-g09-output-files-into.html
The key was to look in apps/data/client/cap/ and XML/edml files there.
Maybe it will be of help in your case too.