Forum Discussion
Power BI Report Server January 2026 – msmdsrv restarts, SQLDmpr files
Hi JacksonWearne ,
We experienced the same issue after upgrading to the January 2026 Power BI Report Server release (msmdsrv restarts and continuous SQLDmpr dump generation).
We opened a support case with Microsoft, and they confirmed this is a known issue in this release. The product team is currently working on a fix.
Temporary Workaround (from Microsoft Support)
Until a fixed build is released, Microsoft advised deleting the generated mini dump files to prevent disk exhaustion:
Default path:
C:\Program Files\Microsoft Power BI Report Server\PBIRS\LogFilesDelete files ending with:
.mdmpThis is only a temporary mitigation and does not resolve the root cause.
You can monitor the official PBIRS changelog for updates:
https://learn.microsoft.com/power-bi/report-server/changelog
If this response was helpful, please accept it as a solution and give kudos to support other community members
Hi JacksonWearne ,
We experienced the same issue after upgrading to the January 2026 Power BI Report Server release (msmdsrv restarts and continuous SQLDmpr dump generation).
We opened a support case with Microsoft, and they confirmed this is a known issue in this release. The product team is currently working on a fix.
Temporary Workaround (from Microsoft Support)
Until a fixed build is released, Microsoft advised deleting the generated mini dump files to prevent disk exhaustion:
Default path:
C:\Program Files\Microsoft Power BI Report Server\PBIRS\LogFiles
Delete files ending with:
.mdmp
This is only a temporary mitigation and does not resolve the root cause.
You can monitor the official PBIRS changelog for updates:
https://learn.microsoft.com/power-bi/report-server/changelog
If this response was helpful, please accept it as a solution and give kudos to support other community members
It looks like we'll have to wait three months for the next version. Are there no bug fixes in the meantime?
Change log for Power BI Report Server - Power BI | Microsoft Learn :
There is a known issue with January 2026 PBIRS where viewing certain types of Power BI reports lead to excessive crash dumps being written to disk. This is being actively worked on and will be fixed in the next release.
There is a new build available today. I will give it a try!
- Version: 1.25.9552.1669 (build 15.0.1120.119), Released: February 25, 2026
- Fixed issue where certain types of Power BI Reports lead to excessive crash dumps being created.
Thank you for this! The new build looks to be working for me!
- Version: 1.25.9552.1669 (build 15.0.1120.119), Released: February 25, 2026
