We are getting the error message "Formula.Firewall: Query '[Query Name]' (step '[Step Name]') references other queries or steps, so it may not directly access a data source. Please rebuild this data combination."
This error appears in a step that merges two local Excel files. Both Excel files' source paths are parametrized. The privacy levels for both data sources are at defaults (we've also tried Organizational and Public). The global and user-file privacy levels are also at defaults.
We've come across a few workarounds:
1) Removing parametrization of source file paths resolves the error.
2) Setting the global privacy level to "Always Ignore Privacy Level Settings" resolves the error.
3) Setting the user-file level privacy level to "Ignore the Privacy Levels and potentially improve performance" resolves the error.
What may be causing the firewall error to be triggerred in this case?