1. IronPDF
2. Troubleshooting
3. Failed to locate IronPdf.Slim.dll

Error: Failed to Locate IronPDF in Python

Assuming you have installed the .NET 6.0 SDK and IronPdf via pip using the following command:

 pip install ironpdf

You may encounter the exception below upon executing the Python script:

Exception has occurred: Exception
Failed to locate IronPdf.Slim.dll at 'C:\Users\Name\AppData\Local\Programs\Python\Python311/IronPdf.Slim'. Please see https://ironpdf.com/troubleshooting/quick-ironpdf-troubleshooting/ for more information
  File "C:\Users\Name\OneDrive\Documents\IronPdfPythonNew\working\viewport.py", line 1, in <module>
    from ironpdf import *
Exception: Failed to locate IronPdf.Slim.dll at 'C:\Users\Name\AppData\Local\Programs\Python\Python311/IronPdf.Slim'. Please see https://ironpdf.com/troubleshooting/quick-ironpdf-troubleshooting/ for more information

Solution

The directory that contains IronPdf.Slim can be specified as follows:

import sys
# This line should point to the root directory that contains the IronPdf.Slim folder.
# Users can determine this location by running `pip uninstall ironpdf` and pressing `N`.
sys.prefix = '/path/to/python/packages'

import sys
# This line should point to the root directory that contains the IronPdf.Slim folder.
# Users can determine this location by running `pip uninstall ironpdf` and pressing `N`.
sys.prefix = '/path/to/python/packages'

For Example

import sys
# This line should point to the root directory that contains the IronPdf.Slim folder.
# Users can determine this location by running `pip uninstall ironpdf` and pressing `N`.
sys.prefix = r'C:\Users\lyty1\AppData\Local\Programs\Python\Python311'

from ironpdf import *

# Instantiate Renderer
renderer = ChromePdfRenderer()

# Create a PDF from a URL or local file path
pdf = renderer.RenderUrlAsPdf("https://ironpdf.com/")

# Export to a file or Stream
pdf.SaveAs("url.pdf")

import sys
# This line should point to the root directory that contains the IronPdf.Slim folder.
# Users can determine this location by running `pip uninstall ironpdf` and pressing `N`.
sys.prefix = r'C:\Users\lyty1\AppData\Local\Programs\Python\Python311'

from ironpdf import *

# Instantiate Renderer
renderer = ChromePdfRenderer()

# Create a PDF from a URL or local file path
pdf = renderer.RenderUrlAsPdf("https://ironpdf.com/")

# Export to a file or Stream
pdf.SaveAs("url.pdf")

Reason

Most third-party libraries are installed in a directory called "site-packages," which is located either within the Python installation directory or within the virtual environment directory if you're using virtual environments. This is the directory accessible by your Python interpreter.

IronPDF will install both IronPdf.Slim and IronPdf.Native.Chrome.Windows.

The exact location can vary depending on the operating system and your Python configuration.