See the following project that reproduce the problem :
TestAspose.zip (83.9 KB)
in my template i have <<[DS.MyProperty.Name]>> where MyProperty is null. aspose generates an error, is it possible to have an inline error directly in the generated report indicating where the error is (using engine.Options = ReportBuildOptions.InlineErrorMessages;). if the report template is complex it is difficult to investigate problems.