getting exception "Could not get page number. (Error: RWI 002)"

Hi!

i am getting an following Exception while getting Web Intelligence report from BO using java.Please Give a suggestion resolve this issue

code:

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DocumentInformation documentInformation = oReportEngine.getDocumentInformation(documentCUID, null, null, null, null);

Exception:

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Could not get page number. (Error: RWI 00223)

getDocumentInformation exception (Error: RWI 00223)[