Web Reference: subprocess.Popen takes a cwd argument to set the Current Working Directory; you'll also want to escape your backslashes ('d:\\test\\local'), or use r'd:\test\local' so that the backslashes aren't interpreted as escape sequences by Python. Dec 18, 2025 · In this guide, we’ll demystify why this error occurs and show you how to fix it by explicitly setting the working directory for subprocesses. We’ll cover basics, advanced scenarios, troubleshooting, and best practices to ensure your dependent files are always found. You can specify the working directory for a subprocess in Python when using the subprocess module by setting the cwd (current working directory) argument in the subprocess.run(), subprocess.Popen(), or other subprocess functions.
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