Purchase Register report printing

I have opened up the Purchase Register report through the Command Centre and thew report has opened completely for the full 12 months of the financial year. Then when I try to print the report I get the message: " There's no information to display. Try changing the filters and then run the report". I have tried changing the filters buty this does no good. There is clearly information there as the system has already run the report. If I try to run the same report through the reports tab it won't even open the report and gives the same message. How can I get this report to print or export?