Subreports using a Custom DataSourc

[aferrand]

Hello,

I do not succeed using a subreport with the custom datasource I created. I think, I made a mistake in my report tranmetting datasource to the subreport. 

My custom datasource is doing rest call during next method so I don't have a proble with database connection. I must have made a mistake with the dataSourceExpression :

<dataSourceExpression><![CDATA[$P{REPORT_DATA_SOURCE}]]></dataSourceExpression>

Is there anyone know how to fulfill the subreport ?

Arnaud