Dataflow combined query fails but individual helper queries are fine
Dataflow Gen2
i have three helper queries: 2 sourced from excel files, one sourced from csv, all saved on sharepoint
i have three separate queries for each of the different sources and am then appending them all into the fact table to be used.
output is to lakehouse
the individual helper queries seem to output ok but the combined query is failing. it gives a generic mashup error each time and I’ve tried to refresh this multiple times
final dataset is expected to be around 5million rows and around 20 columns.
has anyone else encountered this / has a fix?