#377 error al descarregar zip amb documents d'una tasca massiva

[Pep Pérez]

quan s'intenta descarregar el zip per imprimir massivament documents
dona el següent error:

2012-12-10 10:24:58,968 ERROR
[net.conselldemallorca.helium.webapp.mvc.TascaDocumentsController] Error al
generar el zip amb els arxius
java.lang.NullPointerException
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at java.io.FilterOutputStream.write
(FilterOutputStream.java:80)
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at
net.conselldemallorca.helium.webapp.mvc.TascaDocumentsController.documentDescarregarZip
(TascaDocumentsController.java:321)
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at sun.reflect.NativeMethodAccessorImpl.invoke
(NativeMethodAccessorImpl.java:39)
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at sun.reflect.DelegatingMethodAccessorImpl.invoke
(DelegatingMethodAccessorImpl.java:25)
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at java.lang.reflect.Method.invoke(Method.java:585)
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod
(HandlerMethodInvoker.java:176)
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod
(AnnotationMethodHandlerAdapter.java:436)
&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps;&nbps; at