Issues

• Preprocessor(target_aware=False) still fits registered supervision="optional" representations on y

  bug
  OpenTabular/PreTab#96 · Filter by author ChrisW09 opened on Oct 9, 2026

• RepresentationSearchCV lacks predict_proba, classes_ and classifier tags, so nested roc_auc CV returns NaN

  bug
  OpenTabular/PreTab#92 · Filter by author ChrisW09 opened on Oct 9, 2026

• RepresentationSearchCV cannot use group-based CV splitters and accepts no groups or fit parameters

  bug
  OpenTabular/PreTab#91 · Filter by author ChrisW09 opened on Oct 9, 2026

• CrossFittedTransformer.fit_transform forces a dense float64 array: string and sparse outputs crash

  bug
  OpenTabular/PreTab#90 · Filter by author ChrisW09 opened on Oct 9, 2026

• CrossFittedTransformer(Preprocessor(add_missing_indicator=True)) crashes when a fold's training rows contain no missing value

  bug
  OpenTabular/PreTab#89 · Filter by author ChrisW09 opened on Oct 9, 2026

• Standalone transformers drop DataFrame feature names, so reordered columns are silently misaligned

  bug
  OpenTabular/PreTab#85 · Filter by author ChrisW09 opened on Oct 9, 2026

• B/M/I spline knot_locations are sized by output_dim and clipped to the data range instead of used as given

  bug
  OpenTabular/PreTab#81 · Filter by author ChrisW09 opened on Oct 9, 2026

• Default to_spec() files contain bare NaN tokens and are not valid JSON for strict parsers

  bug
  OpenTabular/PreTab#80 · Filter by author ChrisW09 opened on Oct 9, 2026

• CrossFittedTransformer(Preprocessor) relearns column types and category codes per fold, unlike transform

  bug
  OpenTabular/PreTab#79 · Filter by author ChrisW09 opened on Oct 9, 2026

• RepresentationSearchCV with a classifier uses task="regression" for placement; string labels crash

  bug
  OpenTabular/PreTab#77 · Filter by author ChrisW09 opened on Oct 9, 2026

• Preprocessor.transform does not check n_features_in_ for ndarray input; extra columns are silently misaligned

  bug
  OpenTabular/PreTab#72 · Filter by author ChrisW09 opened on Oct 2, 2026

• to_spec / fingerprint_ fail or write unloadable specs for object arrays of numpy scalars and builtin dtypes

  bug
  OpenTabular/PreTab#66 · Filter by author ChrisW09 opened on Oct 2, 2026

• CrossFittedTransformer converts DataFrames to ndarray; a wrapped Preprocessor treats every column as categorical

  bug
  OpenTabular/PreTab#58 · Filter by author ChrisW09 opened on Oct 2, 2026

• ISplineTransformer: 200-point trapezoid integration produces wrong and all-zero basis columns

  bug
  OpenTabular/PreTab#53 · Filter by author ChrisW09 opened on Oct 2, 2026