ErrLookup › dotnet/machinelearning
dotnet/machinelearning
ML.NET is an open source and cross-platform machine learning framework for .NET. · C# · 1,379 source files
Analyzed at 7b76e69cf9 on 2026-09-11. 368 documented errors.
| Code / Message | Type | Severity | Tags |
|---|---|---|---|
| nameof(row) | exception | error | index-out-of-range, indexoutofrangeexception, dataframe |
| The input tokenizer is not using the EnglishRoberta model. | exception | error | csharp, tokenizer, type-mismatch, invalid-operation |
| Bad comparer | exception | error | dotnet, sorting, comparer, argument-validation |
| Strings.InconsistentNullBitMapAndLength | exception | error | argumentexception, null-bitmap, arrow, dataframe |
| Unknown or unsupported protobuf wire type | validation | error | protobuf, tokenizer, corrupt-file, deserialization |
| String.Format(Strings.MismatchedColumnValueType… | validation | error | dotnet, dataframe, type-mismatch, argument-validation |
| The provided url ( ) redirects to the default url ( ) | exception | error | not-supported, redirect, aka-ms, resource-download, ml-net |
| Not a RowToRowMapper. | exception | error | dotnet, ml-net, time-series, unsupported-operation |
| getter must be of type | validation | error | csharp, delegate-signature, type-mismatch, ml-net |
| Strings.IndexIsGreaterThanColumnLength | exception | error | dotnet, dataframe, argument-out-of-range, indexing |
| The tokenizer.json normalizer 'precompiled_charsmap' is not… | validation | error | tokenizer, base64, sentencepiece, invalid-data |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| The function ResourceManagerUtils.EnsureResourceAsync only… | exception | error | not-supported, resource-download, url-host, ml-net |
| Expected column to hold values of type | exception | error | dataframe, argument, decimal, type-mismatch, dotnet |
| Exception of type 'System.ArgumentException' was thrown. | exception | error | argument, schema, dataframe |
| null | exception | error | |
| EmptyFieldWidths | exception | error | fixed-width-parsing, empty-array, configuration, microsoft-data-analysis |
| The provided token IDs could not be decoded. | exception | error | tokenizer, decoding, invalid-state |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| If provided, must be the same as for Ranking Experiments | validation | error | dotnet, mlnet, automl, ranking, argument-validation |
| Invalid JSON. | exception | error | json, deserialization, vocabulary, converter |
| Normalization ' ' is not supported. | exception | error | tokenizers, sentencepiece, normalization |
| Specified label column | exception | error | dotnet, ml-automl, column-name, label |
| Expected value to be of type | validation | error | type-mismatch, append, conversion, column-type |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| Strings.SpansMultipleBuffers | exception | error | argument, arrow, buffer-boundary, dataframe |
| Bad data kind in ColumnTypeExtensions.NumberTypeFromKind | exception | error | mlnet, dataview, datakind, invalid-operation |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| NotImplementedException | exception | error | dotnet, dataframe, not-implemented, virtual-method |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| Type is T | exception | error | not-supported, data-view, type-mismatch |
| The pre_tokenizer 'add_prefix_space' must be a boolean. | validation | error | tokenizers, sentencepiece, json-validation, configuration |
| type.ToString() | exception | error | not-implemented, arrow, dataframe, type-mapping |
| The tokenizer.json model enables byte_fallback but does not… | exception | critical | sentencepiece, byte-fallback, vocabulary, model-loading |
| Invalid call to 'GetGetter' | exception | error | dotnet, mlnet, type-mismatch, dataview |
| Unable to split the file provided into multiple, consistent… | exception | error | dotnet, ml-automl, csv, data-format |
| File too big to open. | exception | error | csharp, images, filesystem, file-size |
| Replace normalizer 'Regex' pattern must be a string. | validation | error | tokenizer, normalizer, type-mismatch, regex |
| Invalid role. | validation | error | csharp, chat-template, invalid-role |
| {0} {1} | exception | error | inconsistent-state, column-length, row-count, invariant |
| Object reference not set to an instance of an object. | exception | error | nullref, codegen, pipeline |
| Unable to infer column types of the file provided. | exception | error | dotnet, ml-automl, type-inference, data-format |
| Column ' ' does not exist | validation | error | column-not-found, groupby, keyerror, dataframe |
| Bad type in ColumnTypeExtensions.NumberTypeFromType | exception | error | mlnet, dataview, type-mapping, invalid-operation |
| nameof(startIndex) | exception | error | argument-out-of-range, dataframe, indexer, bounds-check |
| Unexpected end of data while reading varint. | validation | error | protobuf, tokenizer, invalid-data, truncated-input |
| The runner metric manager is of type | exception | error | argument-exception, type-mismatch, automl, runner |
| Label column index ( ) is >= than # of inferred columns ( ). | exception | error | dotnet, ml-automl, index, argument-out-of-range |
| The merge value ' ' is too short to be merged with a prefix… | exception | error | merge-file, prefix, bpe, corrupt-data |
| Cannot cast elements of column | exception | error | invalid-cast, generic-type, groupby, type-mismatch |
| failed to insert key: wrong key order | exception | error | trie, ordering, sorted-insert, tokenizer |
| Expected either or to be provided | validation | error | argument, csv, validation |
| IDatasetManager must be either ITrainTestDatasetManager or… | exception | error | dotnet, ml-automl, unsupported-type |
| OperationCanceledException | exception | warning | dotnet, ml-automl, cancellation |
| The data type ' ' is not handled currently. | exception | error | mlnet, datakind, codegen, type-mapping |
| Value cannot be null. (Parameter 'retainedJoinColumnNames') | validation | error | argumentnull, join, dataframe |
| An 'added_tokens' entry must have a string 'content' and a… | validation | error | json, tokenizer, schema-validation, invalid-data |
| Specified column is not found in the dataset. | exception | error | dotnet, ml-automl, column-name, argument |
| The content of the vocabulary file | exception | error | csharp, json, tokenizer |
| Value cannot be null. (Parameter 'row') | validation | error | argument-null, append, row, dataframe |
| ArgumentNullException | exception | error | tokenizers, null-check, argument-null |
| min must not exceed max (Parameter 'max') | exception | error | argument-out-of-range, array-utils, ml-net |
| nameof(groupByColumnIndex) | exception | error | argument-exception, dataframe, groupby, index-out-of-range |
| The layer count is not enough to cover all layers, did you… | validation | error | genai, device-map, configuration |
| The trainer ' ' is not handled currently. | exception | error | codegen, mlnet, unsupported-trainer, argument-exception |
| nameof(T) | exception | error | not-implemented, arrow, dataframe, type-mapping |
| The special token ' ' is not in the vocabulary or assigned… | exception | error | csharp, invalid-argument, vocabulary, tokenizer |
| Invalid base64 string | validation | error | base64, format, parsing, tokenizer |
| Value cannot be null. (Parameter 'getter') Getter of type | exception | error | dotnet, type-mismatch, delegate, annotations |
| Duplicate column name | validation | error | dotnet, mlnet, automl, column-information, validation |
| Strings.MultipleMismatchedValueType (formatted with… | exception | error | dotnet, dataframe, argument-validation |
| nameof(index) | exception | error | argumentoutofrange, index, null-bitmap, append |
| Only 1 unknown dimension is allowed | exception | error | onnx, machine-learning, argument-out-of-range, tensor-shape |
| The encoding name ' ' is not supported. The only supported… | exception | error | tokenizers, argument, encoding |
| throw new ArgumentNullException(nameof(vocabularyPath)); | exception | error | csharp, argument-null, tokenizer |
| engine (Parameter 'engine') | exception | error | null-argument, pooling |
| failed to insert key: negative value | validation | error | trie, argument, validation, tokenizer |
| Parameter.Count exceeds the number of columns | validation | error | append, schema-mismatch, column-count, argument |
| Strings.MismatchedValueType (formatted with typeof(string)) | exception | error | |
| type | validation | error | dotnet, mlnet, argument-null, schema-builder |
| columns | validation | error | csharp, null-argument, reflection, ml-net |
| Invalid merge file format at line | exception | error | csharp, file-format, tokenizer |
| can't add or update result that already save to csv | exception | error | dotnet, ml-automl, duplicate-record |
| The BOS, EOS, or UNK token is not present in the vocabulary. | exception | critical | sentencepiece, model-loading, vocabulary, corrupt-file |
| Strings.BadColumnCast (formatted with column.DataType… | exception | error | dotnet, dataframe, type-mismatch, argument-exception |
| The post-processor ' ' token ' ' with id does not match the… | validation | error | tokenizer, consistency, post-processor, invalid-data |
| Dimension must be divisible by 2 | validation | error | rope, position-embedding, argument |
| Type IPredictionTransformer not implemented by provided type | exception | error | csharp, mlnet, reflection, interface, argument-exception |
| exceeds buffer capacity | validation | error | dotnet, argument, buffer, memory-limit |
| is not supported! | exception | error | not-implemented, enum, metric, automl |
| Strings.MismatchedColumnLengths | exception | error | argumentexception, binary-operation, decimal-column, length-mismatch |
| kind | exception | error | notsupported, dataframe, csv |
| Start must be called on a ModelLoader before it can be used. | exception | error | mlnet, invalid-state, lifecycle, model-loading, dotnet |
| Strings.MapIndicesExceedsColumnLength | exception | error | dotnet, dataframe, argument-validation |
| Column lengths are mismatched | validation | error | argument, fillna, column-count, shape |