Error 500: Internal Server Error

URI
/articulos/list
Class
java.lang.NullPointerException
Message
Cannot get property 'titulo' on null object

Trace

    Line | Method
->>  467 | runWorker in /articulos/list.gsp
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Caused by GrailsTagException: Error executing tag <g:publicacion>: Cannot get property 'titulo' on null object
->>   33 | doCall    in /WEB-INF/grails-app/views/articulos/list.gsp
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 

Caused by NullPointerException: Cannot get property 'titulo' on null object
->>  106 | doCall    in esid.UtilesTagLib$_closure6
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 
|     49 | doCall    in gsp_esid_articuloslist_gsp$_run_closure2
|     58 | run . . . in gsp_esid_articuloslist_gsp
|   1145 | runWorker in java.util.concurrent.ThreadPoolExecutor
|    615 | run . . . in java.util.concurrent.ThreadPoolExecutor$Worker
^    745 | run       in java.lang.Thread