[rules-users] Problem with Guvnor using Rest API

Hey Guys. I am using guvnor 5.5.0.Final. I am accesing to from another app using the REST API. I am currently having a problem. I create a new package, sending a post to guvnor/rest/packages/, sending it an xml version of PackageMetadata. Then, I create assets (drl files), by sending a post to guvnor/rest/packages/" + packageName + "/asset, with the drl contents. This works fine. The problem in with package building. I read somewhere that it is automatically built when you create a new asset or update one. But just after creating the package, I go to the package url, the one I configure in the changeset, localhost:8080/guvnor/org.drools.guvnor.Guvnor/package/mypackage/LATEST, and I get a NPE, java.lang.NullPointerException java.io.OutputStream.write(OutputStream.java:75) org.drools.guvnor.server.files.FileManagerService.loadBinaryPackage(FileManagerService.java:201) org.drools.guvnor.server.files.FileManagerService$Proxy$_$$_WeldClientProxy.loadBinaryPackage(FileManagerService$Proxy$_$$_WeldClientProxy.java) org.drools.guvnor.server.files.PackageDeploymentServlet$1.execute(PackageDeploymentServlet.java:260) org.drools.guvnor.server.files.RepositoryServlet.doAuthorizedAction(RepositoryServlet.java:59) org.drools.guvnor.server.files.PackageDeploymentServlet.doGet(PackageDeploymentServlet.java:139) javax.servlet.http.HttpServlet.service(HttpServlet.java:742) javax.servlet.http.HttpServlet.service(HttpServlet.java:847) org.jboss.weld.servlet.ConversationPropagationFilter.doFilter(ConversationPropagationFilter.java:62) org.jboss.solder.servlet.exception.CatchExceptionFilter.doFilter(CatchExceptionFilter.java:65) org.jboss.solder.servlet.event.ServletEventBridgeFilter.doFilter(ServletEventBridgeFilter.java:74) If I build the package manually, I am able to get the PKG there. I am making something wrong? Is there a way to make it build the package from REST? Thanks! Demian