> ## Documentation Index
> Fetch the complete documentation index at: https://arize-ax.mintlify.dev/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# File Upload FAQ

> Frequently Asked Questions About UI Drag & Drop in Arize

### Validating your Upload

Before uploading your file, the job will be validated to test for any schema or file errors. The validation:

* scans a subset of records within the file and determines whether that subset can be successfully imported

* if the subset of records cannot be imported, the resulting error will be surfaced and the dry run can be repeated

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  <img src="https://storage.googleapis.com/arize-phoenix-assets/assets/images/arize-docs-images/e71c19ff-image.jpeg" />
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* Avro file with `list_of_string` feature validation will include `array<string>`:

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  <img src="https://storage.googleapis.com/arize-phoenix-assets/assets/images/arize-docs-images/004e78d1-image.jpeg" />
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* parquet file with `list_of_string` feature validation will include `list<item:utf8, nullable>`:

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  <img src="https://storage.googleapis.com/arize-phoenix-assets/assets/images/arize-docs-images/d0df8d18-image.jpeg" />
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### Debugging

After a job for your file has been started, details about the model, file name, the rows processed and any potential errors and the locations of those errors will be presented in the details pane.

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  <img src="https://storage.googleapis.com/arize-phoenix-assets/assets/images/arize-docs-images/179ac8f9-image.jpeg" />
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