Forum Discussion
Initialization of data source failed - Excel Power BI connection
What we have found is that the connection string to the model appears to have a setting/variable which Microsoft have potentially removed.
Below is the old connection string used across our various Excel files, which would output the above error. Removing the part in bold appears to fix the issue.
Provider=MSOLAP.8;Integrated Security=ClaimsToken;Persist Security Info=True;Initial Catalog=<redacted>;Data Source=pbiazure://api.powerbi.com;MDX Compatibility=1;Safety Options=2;MDX Missing Member Mode=Error;Identity Provider=https://login.microsoftonline.com/common, https://analysis.windows.net/powerbi/api, <redacted>;Catalog Rebound=True;Update Isolation Level=2
Thought I'd post in case anybody was coming across the same issue, as I'm sure these connection strings were automatically generated when we set the files up.
Thank you - this solution works perfectly. Can anyone tell me the root cause of the issue - how is "Catalog Rebound=True" being added to the string? Is it different versioning amongst people using a shared file or something else? While we've implemented the fix shared, we'd like to fix the root cause of the issue as well.