Cash Flow Report Issues

Hello

I am trying to run the Cash Flow report and when I attempt, I get an error that says No matching data found and the entire SAP B1 system freezes up.   I have to close SAPB1 from Task Manager and restart.

To open the report:

Financials >Financial Reports > Financial >Cash Flow.I have selected the date range, the accounts to use and requested that the opening balance be calculated.    I hit submit and the system freezes. 

Please advise.

Thanks

Jagriti