Error: Empty content not valid for content model: '(page,)'

[pravin.cognos]

Dear All

I have created a multipage report. Report runs without errors if I run the report. But when I choose to run a specific report page from the page explorer, I face the below error.

RSV-SRV-0003

       The report specification contains an error at line ' 100', column ' 18'.

Details 

Empty content not valid for content model: '(page,)' RSV-SRV-0042 Trace back: RSReportService.cpp(629): RSException: CCL_CAUGHT: RSReportService::process() RSReportServiceMethod.cpp(177): RSException: CCL_RETHROW: RSReportServiceMethod::process(): asynchRunSpecification_Request RSASyncExecutionThread.cpp(562): RSException: RSASyncExecutionThread::checkException RSASyncExecutionThread.cpp(192): RSException: CCL_CAUGHT: RSASyncExecutionThread::run(): asynchRunSpecification_Request RSReportDOMBuilder.cpp(151): RSException: CCL_THROW: RSReportDOMBuilder::parse

I found an article in IBM site which suggests to debug the xml in the notepad. I tried that option too but could not resolve it.

It is a 15 page report so at times I have to run it by single page to test the page. Please let me know the reason for this error and how can it be resolved.

Thanks
Pravin.