Export a datgrid to excel via Excel Exporter

I am trying to export a data grid to excel. I have two entities, Paleta and ResourceExcelDocument. ResourceExcelDocument has a generalization with FileDocument and there is a 1 to many associattion between them called Paleta_ResourceExcelDocument. I have an error when I try to export it all and i don’t know why. Anyone could help me?
1 answers

Are you sure you're not passing any 'empty' parameter values to the GenerateExcelDoc Java action? You can place a breakpoint to find out.