---
title: "Handling errors in document processing workflows | Nutrient Python SDK"
canonical_url: "https://www.nutrient.io/guides/python/troubleshooting/error-handling/"
md_url: "https://www.nutrient.io/guides/python/troubleshooting/error-handling.md"
last_updated: "2026-05-30T02:20:01.349Z"
description: "Use structured error handling for document workflows with Nutrient Python SDK."
---

# Handling errors in document processing workflows

Use structured error handling to keep document workflows predictable. Validate inputs before processing, catch SDK exceptions, and return clear messages when operations fail.

[Download sample](https://www.nutrient.io/downloads/samples/python/error-handling.zip)

## How Nutrient supports this workflow

Nutrient Python SDK uses Python’s exception model and raises `NutrientException` when an operation fails.

You don’t need to manage:

- Low-level error code interpretation

- Partial failure state handling

- Resource cleanup logic after failures

Use standard Python `try`/`except` patterns to control error flow in your application.

## Complete implementation

This example shows one way to validate input, run conversion, and handle failures.

Import the required SDK classes and `pathlib` for file validation:

```python

from pathlib import Path
from nutrient_sdk import Document
from nutrient_sdk import NutrientException

```

Create a dedicated function for conversion so `main` can handle errors at the call site:

```python

def convert_document(input_file, output_file):
    with Document.open(input_file) as document:
        print("Document opened successfully.")
        print("Converting to PDF...")
        document.export_as_pdf(output_file)

```

In `main`, validate the input path, call `convert_document`, and catch `NutrientException` to report actionable output:

```python

def main():
    input_file = "input.pdf"
    output_file = "output.pdf"

    if not Path(input_file).is_file():
        print(f"Error: Input file '{input_file}' not found.")
        raise SystemExit(1)

    print(f"Opening document: {input_file}")

    try:
        convert_document(input_file, output_file)
    except NutrientException as e:
        print(f"Nutrient SDK Error: {e}")
        raise SystemExit(1)

if __name__ == "__main__":
    main()

```

## Summary

The error handling flow has three steps:

1. Validate that the input file exists.

2. Open the document and run conversion.

3. Catch `NutrientException` and return meaningful feedback.

Nutrient raises `NutrientException` for SDK failures, so you don’t need to implement custom low-level error parsing.

You can download [this sample package](https://www.nutrient.io/downloads/samples/python/error-handling.zip) to run the example locally.
---

## Related pages

- [Nutrient Python SDK troubleshooting guides](/guides/python/troubleshooting.md)