To resolve the issue with the file list field in your Dify workflow application after upgrading to version 0.14.2, ensure that the file variable in the start node is correctly set to an Array[File] type. This setup is crucial for handling multiple files without encountering iterator errors.

Here's a step-by-step guide to configure it properly:

1. Set the File Variable: Ensure that the file variable in the start node is configured as an Array[File]. This means it should be a list of files, not a single file.

2. Add a List Operation Node: After the start node, include a list operation node. This node will process each file in the list, allowing you to filter and extract attributes such as file format type, file name, and size.

3. Process Files Appropriately: Use the list operation node to direct different file types to their corresponding processing nodes. This setup will help manage various file formats effectively.

This configuration ensures that the iteration node can handle each file in the list correctly, preventing iterator errors and allowing for precise control over different file processing flows ^[1][2][3].

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Fixed in #12035