Hi KNIME Team, I’m encountering an issue with the DB Loader node when uploading data to a Google BigQuery table using Parquet format. This problem started occurring only after upgrading to version 5.4.4. In earlier versions (e.g., 5.4.3 and prior), the exact same workflow and configuration worked perfectly. The error message I’m receiving is: Execute failed: No FileSystem for scheme “file” This seems to indicate a problem related to how file systems are handled internally in this version when writing Parquet files prior to the BigQuery upload. Repro steps: Use the DB Loader node. Target: Google BigQuery table. Data format: Parquet. Run in KNIME 5.4.4 (or newer). Execution fails with the above error. Note: When I run the same workflow in version 5.4.3 or earlier, it works without issues. This suggests a regression or dependency change introduced in 5.4.4. I’d appreciate it if the dev team could review this behavior. Let me know if more logs or a sample workflow are needed to help reproduce it. [image] [image] Best regards, Jaime Alzate

Hello @JaimeAlzx , thanks for reporting the problem and sorry for the inconveniences. This has already been reported here and will be fixed with version 5.5.1 and 5.4.5 of the KNIME Analytics Platform. Bye Tobias

Bug in DB Loader Node (Parquet to BigQuery) – "No FileSystem for scheme 'file'" since v5.4.4

KNIME Extensions

forum July 21, 2025, 11:07am 6

Internal ticket ID: AP-24482
Summary: DB Loader fails when connected to Google BigQuey with No FileSystem for scheme “file”
Fix version(s): 5.4.5, 5.5.1
Other related topic(s):