### Steps to Reproduce the error 1. Upload the data file **without** the metadata file. 2. Select one classification design sample_names pair. 3. The number of splits is not important (I chose 2). 4. Use RandomizedSearchCV (I chose 2 iter). 5. Multi-threading is not important (I chose off). 6. Algorithms: **SCM**. ### Log - Error in MetaboModel.py (line 41 in original file, 49 in log): search.fit(X_train, y_train) - See log file for details : [medic.log](https://github.com/user-attachments/files/17498608/medic.log) ### Environment - OS: Windows 11 - pyscm-ml: 1.1.2