Microsoft Fabric Data Engineer Associate DP-700 Practice Question

The error indicates that the Copy data activity cannot detect the expected comma (,) in at least one line of the incoming files. The most common root cause is that the file structure has changed-for example, a different delimiter (such as semicolon or tab) is now used, or the file is no longer a valid CSV. The quickest way to eliminate the error is to edit the dataset that the Copy data activity uses and verify the file format settings. By explicitly configuring the correct column and row delimiters (or enabling "Detect delimiter" with preview), Fabric will correctly parse the file and the pipeline will run without failures.

Simply increasing DIUs, enabling binary copy, or turning on fault tolerance does not correct the underlying parsing problem. These actions might mask the issue or waste resources, but the activity would still fail whenever the delimiter mismatch occurs. Therefore, checking and updating the dataset's file format properties is the appropriate first step.