According to Intuit, the error code referencing Microsoft’s msvcr80.dll is an error that can occur when running the Rebuild Data utility on a company file (.qbw) that had been converted from an older to a newer version. It indicates that the company file (.qbw) had possible data corruption before the file was converted to the newer version.
The error is accompanied by the following:
QuickBooks has encountered a problem and needs to close. We are sorry for the inconvenience. If you were in the middle of something, the information you were working on might be lost. Please tell Microsoft about this problem. We have created an error report that you can send to us. We will treat this report as confidential and anonymous. To see what data this error report contains, click here.
Clicking on the link to the error report displays:
Error signature AppName: qbw32.exe AppVer: 18.0.4001.606 ModName: msvcr80.dll
If possible, Intuit recommends returning to the file before it was converted to the newer version, repairing the damage, and re-converting to the newer version.
However, if the file had been converted some time ago, this solution isn’t practical.
For more information on this error, consult this Intuit knowledge base article.