Error when opening payroll reports - Access violation in module Task0150.exe

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Hello! We process our payroll in Sage BusinessWorks. After printing checks, we print out the Check Register report.

We had no problems last week; however, after printing checks and attempting to open the register report today, we got the following error message:

Access violation at address 0072D587 in module 'Task0150.exe'. Read of address 00000000.

Clicking OK leads to a second message:

A database error has occurred while performing an operation. (CDSFilter: Cannot perform this operation on a closed dataset)

I've tried opening a variety of reports from the Reports menu, with the same result. We have tried opening BusinessWorks on two different workstations and each one has the same outcome.

We've also restarted the server that BW is hosted on, no change. And no updates or changes have been made to our BW installation in the past week.