Forum Discussion

Community Champion

4 years ago

Strange error when appending

Hi all, we have two tables: - T1, imported from Snowflake - T2, imported from PBI dataflow A2. Dataflow A2 pulls in turn from another dataflow, B2 I can read T1 and T2 into Power Query, do so...

Community Support

4 years ago

Hi AlB

Actually, M engine error is usually related to the data source. Please check the advanced editor.

I also find 2 related links, will they help?

Failed to save modifications to the server. Error returned: 'M Engine error: ''. '.

AAS Processing Error “Error returned: 'M Engine error: 'Microsoft.Data.Mashup; Token Comma expected” - Data Analytics | FourMoo and Power BI

Best Regards,

Community Support Team _Tang

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