Liferay Service Builder not working as expected - liferay-6

Question

I've created a Liferay plugin project which include a JSF+PF based portlet, on which I've created a service.xml file as I aim to create a database table.
The problem is when I try to build the service, by using the Service Builder feature, neither the service layer nor the model layer are created. Actually, and despite of the fact that 'Build Successful' message is displayed in the eclipse console, none of the Service Builder related stuff is created:
WEB-INF/service/*,
/src/db/*,
META-INF/*,
WEB-INF/sql/*,
service.properties.
The log displayed is the following one:
Buildfile: C:\Liferay\carevid\liferay-6.2-ce-ga6\liferay-plugins-sdk-6.2\portlets\carevid-entities-portlet\build.xml
build-service:
[jar] Building MANIFEST-only jar: C:\Liferay\carevid\liferay-6.2-ce-ga6\liferay-plugins-sdk-6.2\portlets\carevid-entities-portlet\service-builder-classpath.jar
[delete] Deleting: C:\Liferay\carevid\liferay-6.2-ce-ga6\liferay-plugins-sdk-6.2\portlets\carevid-entities-portlet\service-builder-classpath.jar.manifest
[delete] Deleting: C:\Liferay\carevid\liferay-6.2-ce-ga6\liferay-plugins-sdk-6.2\portlets\carevid-entities-portlet\service-builder-classpath.jar
[echo] Loading jar:file:/C:/Liferay/carevid/apache-tomcat-7.0.59/webapps/ROOT/WEB-INF/lib/portal-impl.jar!/system.properties
[echo] Loading jar:file:/C:/Liferay/carevid/apache-tomcat-7.0.59/webapps/ROOT/WEB-INF/lib/portal-impl.jar!/portal.properties
[echo] Loading file:/C:/Liferay/carevid/apache-tomcat-7.0.59/webapps/ROOT/WEB-INF/classes/portal-ext.properties
[echo] Loading jar:file:/C:/Liferay/carevid/apache-tomcat-7.0.59/webapps/ROOT/WEB-INF/lib/portal-impl.jar!/com/liferay/portal/tools/dependencies/portal-tools.properties
[echo] 20180315091704988 (El parámetro no es correcto)
[echo] java.lang.NullPointerException
[echo] at com.liferay.portal.tools.servicebuilder.ServiceBuilder.getEntity(ServiceBuilder.java:1012)
[echo] at com.liferay.portal.tools.servicebuilder.ServiceBuilder.getEntity(ServiceBuilder.java:1080)
[echo] at com.liferay.portal.tools.servicebuilder.ServiceBuilder._parseEntity(ServiceBuilder.java:5003)
[echo] at com.liferay.portal.tools.servicebuilder.ServiceBuilder.<init>(ServiceBuilder.java:709)
[echo] at com.liferay.portal.tools.servicebuilder.ServiceBuilder.main(ServiceBuilder.java:230)
[mkdir] Created dir: C:\Liferay\carevid\liferay-6.2-ce-ga6\liferay-plugins-sdk-6.2\portlets\carevid-entities-portlet\docroot\WEB-INF\service-classes
[jar] Building MANIFEST-only jar: C:\Liferay\carevid\liferay-6.2-ce-ga6\liferay-plugins-sdk-6.2\portlets\carevid-entities-portlet\docroot\WEB-INF\lib\carevid-entities-portlet-service.jar
[delete] Deleting directory C:\Liferay\carevid\liferay-6.2-ce-ga6\liferay-plugins-sdk-6.2\portlets\carevid-entities-portlet\docroot\WEB-INF\service-classes
BUILD SUCCESSFUL
Although Service Builder related build process finishes successfully (aparently), a java.lang.NullPointerException arises within that build process.
I'd really appreciate whether someone could explain to me what's happening and how I should procced to sort this problem out. Thanks.
(I'm working with liferay-6.2-ce-ga6 version)

Answer 1

You could check twice your service.xml.
That NullPointer seems to be ServiceBuilder that can't find your defined entity and so it can't generate all the classes.
You can have a look to service-builder definition if you need documentation about some tags: liferay-service-builder_6_2_0.dtd