topic Re: A device attached to the system is not functioning- Power BI on Premises scheduled refresh fails in Report Server https://community.fabric.microsoft.com/t5/Report-Server/A-device-attached-to-the-system-is-not-functioning-Power-BI-on/m-p/2542400#M24338 <P>Sounds like either your PBIRS server or the data source you are refreshing from is having hardware issues. I would suggest you start by checking the windows event logs in both these systems.</P> Thu, 26 May 2022 23:41:28 GMT d_gosbell 2022-05-26T23:41:28Z A device attached to the system is not functioning- Power BI on Premises scheduled refresh fails https://community.fabric.microsoft.com/t5/Report-Server/A-device-attached-to-the-system-is-not-functioning-Power-BI-on/m-p/2538706#M24305 <P>We have recently found some of our Power BI reports which has both source excel files and Database has been failing to refresh through schedule with the error message as&nbsp;A device attached to the system is not functioning. . The exception was raised by the IDataReader interface. Please review the error message and provider documentation for further information and corrective action. [1] -1055784934: The command has been canceled.. The exception was raised by the IDataReader interface. Please review the error. I tried to do the manual refresh of the same report in Power BI desktop and then schedule refresh the same it worked. I was also able to connect to source excel files successfully as well still it was throwing the same error until i do the manual refresh. I want to find out from this forum what would be the cause of this error&nbsp;A device attached to the system is not functioning how did manual refresh fix?</P><P>We are trying to understand the rootcause so that this issue wont be repeated.</P> Wed, 25 May 2022 11:13:23 GMT https://community.fabric.microsoft.com/t5/Report-Server/A-device-attached-to-the-system-is-not-functioning-Power-BI-on/m-p/2538706#M24305 soumyas2505 2022-05-25T11:13:23Z Re: A device attached to the system is not functioning- Power BI on Premises scheduled refresh fails https://community.fabric.microsoft.com/t5/Report-Server/A-device-attached-to-the-system-is-not-functioning-Power-BI-on/m-p/2542400#M24338 <P>Sounds like either your PBIRS server or the data source you are refreshing from is having hardware issues. I would suggest you start by checking the windows event logs in both these systems.</P> Thu, 26 May 2022 23:41:28 GMT https://community.fabric.microsoft.com/t5/Report-Server/A-device-attached-to-the-system-is-not-functioning-Power-BI-on/m-p/2542400#M24338 d_gosbell 2022-05-26T23:41:28Z