NumPy: ValueError: numpy.dtype size changed (binary incompatibility)
Traceback (most recent call last):
File "train.py", line 1, in <module>
import pandas
ValueError: numpy.dtype size changed, may indicate binary incompatibility. Expected 96 from C header, got 88 from PyObject
Immediate Remediation
bash
pip install --force-reinstall --no-cache-dir numpy
Root Cause Analysis
C extensions like pandas or scikit-learn are compiled against one NumPy ABI version, and when the installed NumPy package is upgraded/downgraded without recompiling those extensions, the dtype struct layout becomes mismatched, triggering this ABI check error.
Verification & Guardrails
- Identify the library that requires a specific numpy version with `pip show` and pin it accordingly.
- If using conda, run `conda update --all` to guarantee compiled wheels match the NumPy ABI.
- Use a virtual environment to avoid global NumPy changes affecting other projects.
Have a custom or uncategorized crash?
Run your trace through our in-memory client privacy sandbox for instant SRE remediation.