input example set has not attribute..
This is my process, why he said "input example set has not attribute.." when I click start? HELP ME PLEASEEEE
<?xml version="1.0" encoding="UTF-8"?><process version="7.3.001">
<operator activated="true" class="read_csv" compatibility="7.3.001" expanded="true" height="68" name="Read CSV" width="90" x="45" y="34">
<parameter key="csv_file" value="C:\Users\Damiano\Desktop\csv\5000IstanzeOM.csv"/>
<parameter key="column_separators" value=";"/>
<parameter key="trim_lines" value="false"/>
<parameter key="use_quotes" value="true"/>
<parameter key="quotes_character" value="""/>
<parameter key="escape_character" value="\"/>
<parameter key="skip_comments" value="false"/>
<parameter key="comment_characters" value="#"/>
<parameter key="parse_numbers" value="true"/>
<parameter key="decimal_character" value="."/>
<parameter key="grouped_digits" value="false"/>
<parameter key="grouping_character" value=","/>
<parameter key="date_format" value="yyyy.MM.dd G 'at' HH:mm:ss z"/>
<parameter key="first_row_as_names" value="false"/>
<list key="annotations">
<parameter key="0" value="Name"/>
</list>
<parameter key="time_zone" value="SYSTEM"/>
<parameter key="locale" value="English (United States)"/>
<parameter key="encoding" value="windows-1252"/>
<list key="data_set_meta_data_information">
<parameter key="0" value="graphsNumber,15-8016,16-10377,14-2797,15-1317,14-435,21-2,22-1,21-1,22-0,15-4855,label.true.polynominal.attribute"/>
</list>
<parameter key="read_not_matching_values_as_missings" value="true"/>
<parameter key="datamanagement" value="double_array"/>
</operator>
</process>
<?xml version="1.0" encoding="UTF-8"?><process version="7.3.001">
<operator activated="true" class="remap_binominals" compatibility="7.3.000" expanded="true" height="82" name="Remap Binominals" width="90" x="112" y="187">
<parameter key="attribute_filter_type" value="single"/>
<parameter key="attribute" value="Label"/>
<parameter key="attributes" value=""/>
<parameter key="use_except_expression" value="false"/>
<parameter key="value_type" value="binominal"/>
<parameter key="use_value_type_exception" value="false"/>
<parameter key="except_value_type" value="binominal"/>
<parameter key="block_type" value="value_matrix_start"/>
<parameter key="use_block_type_exception" value="false"/>
<parameter key="except_block_type" value="value_matrix_start"/>
<parameter key="invert_selection" value="false"/>
<parameter key="include_special_attributes" value="true"/>
<parameter key="negative_value" value="0"/>
<parameter key="positive_value" value="1"/>
</operator>
</process>
<?xml version="1.0" encoding="UTF-8"?><process version="7.3.001">
<operator activated="true" class="numerical_to_binominal" compatibility="7.3.001" expanded="true" height="82" name="Numerical to Binominal" width="90" x="313" y="289">
<parameter key="attribute_filter_type" value="all"/>
<parameter key="attribute" value=""/>
<parameter key="attributes" value=""/>
<parameter key="use_except_expression" value="false"/>
<parameter key="value_type" value="numeric"/>
<parameter key="use_value_type_exception" value="false"/>
<parameter key="except_value_type" value="real"/>
<parameter key="block_type" value="value_series"/>
<parameter key="use_block_type_exception" value="false"/>
<parameter key="except_block_type" value="value_series_end"/>
<parameter key="invert_selection" value="false"/>
<parameter key="include_special_attributes" value="false"/>
<parameter key="min" value="0.0"/>
<parameter key="max" value="0.0"/>
</operator>
</process>
<?xml version="1.0" encoding="UTF-8"?><process version="7.3.001">
<operator activated="true" class="loop_parameters" compatibility="7.3.001" expanded="true" height="103" name="Loop Parameters" width="90" x="447" y="187">
<list key="parameters">
<parameter key="k-NN.k" value="[2;10;3;linear]"/>
</list>
<parameter key="error_handling" value="fail on error"/>
<parameter key="synchronize" value="false"/>
<process expanded="true">
<operator activated="true" class="set_role" compatibility="7.3.001" expanded="true" height="82" name="Set Role" width="90" x="179" y="85">
<parameter key="attribute_name" value="graphsNumber,15-8016,16-10377,14-2797,15-1317,14-435,21-2,22-1,21-1,22-0,15-4855,label"/>
<parameter key="target_role" value="label"/>
<list key="set_additional_roles"/>
</operator>
<operator activated="true" class="x_validation" compatibility="7.3.001" expanded="true" height="145" name="Validation" width="90" x="447" y="187">
<parameter key="create_complete_model" value="false"/>
<parameter key="average_performances_only" value="true"/>
<parameter key="leave_one_out" value="false"/>
<parameter key="number_of_validations" value="5"/>
<parameter key="sampling_type" value="stratified sampling"/>
<parameter key="use_local_random_seed" value="false"/>
<parameter key="local_random_seed" value="1992"/>
<process expanded="true">
<operator activated="true" class="k_nn" compatibility="7.3.001" expanded="true" height="82" name="k-NN" width="90" x="45" y="34">
<parameter key="k" value="2"/>
<parameter key="weighted_vote" value="false"/>
<parameter key="measure_types" value="MixedMeasures"/>
<parameter key="mixed_measure" value="MixedEuclideanDistance"/>
<parameter key="nominal_measure" value="NominalDistance"/>
<parameter key="numerical_measure" value="EuclideanDistance"/>
<parameter key="divergence" value="GeneralizedIDivergence"/>
<parameter key="kernel_type" value="radial"/>
<parameter key="kernel_gamma" value="1.0"/>
<parameter key="kernel_sigma1" value="1.0"/>
<parameter key="kernel_sigma2" value="0.0"/>
<parameter key="kernel_sigma3" value="2.0"/>
<parameter key="kernel_degree" value="3.0"/>
<parameter key="kernel_shift" value="1.0"/>
<parameter key="kernel_a" value="1.0"/>
<parameter key="kernel_b" value="0.0"/>
</operator>
<connect from_port="training" to_op="k-NN" to_port="training set"/>
<connect from_op="k-NN" from_port="model" to_port="model"/>
<portSpacing port="source_training" spacing="0"/>
<portSpacing port="sink_model" spacing="0"/>
<portSpacing port="sink_through 1" spacing="0"/>
</process>
<process expanded="true">
<operator activated="true" class="apply_model" compatibility="7.1.001" expanded="true" height="82" name="Apply Model" width="90" x="45" y="30">
<list key="application_parameters"/>
<parameter key="create_view" value="false"/>
</operator>
<operator activated="true" class="performance" compatibility="7.3.001" expanded="true" height="82" name="Performance" width="90" x="180" y="30">
<parameter key="use_example_weights" value="true"/>
</operator>
<operator activated="true" class="performance_to_data" compatibility="7.3.001" expanded="true" height="82" name="Performance to Data" width="90" x="45" y="165"/>
<operator activated="true" class="write_csv" compatibility="7.3.001" expanded="true" height="82" name="Write CSV" width="90" x="179" y="238">
<parameter key="csv_file" value="/Applications/XAMPP/xamppfiles/htdocs/studente1/browsing_workflow2/codici/HospitalDM13_eswa/performance_knn.csv"/>
<parameter key="column_separator" value=";"/>
<parameter key="write_attribute_names" value="true"/>
<parameter key="quote_nominal_values" value="true"/>
<parameter key="format_date_attributes" value="true"/>
<parameter key="append_to_file" value="true"/>
<parameter key="encoding" value="SYSTEM"/>
</operator>
<connect from_port="model" to_op="Apply Model" to_port="model"/>
<connect from_port="test set" to_op="Apply Model" to_port="unlabelled data"/>
<connect from_op="Apply Model" from_port="labelled data" to_op="Performance" to_port="labelled data"/>
<connect from_op="Performance" from_port="performance" to_op="Performance to Data" to_port="performance vector"/>
<connect from_op="Performance to Data" from_port="example set" to_op="Write CSV" to_port="input"/>
<connect from_op="Performance to Data" from_port="performance vector" to_port="averagable 1"/>
<portSpacing port="source_model" spacing="0"/>
<portSpacing port="source_test set" spacing="0"/>
<portSpacing port="source_through 1" spacing="0"/>
<portSpacing port="sink_averagable 1" spacing="0"/>
<portSpacing port="sink_averagable 2" spacing="0"/>
<portSpacing port="sink_averagable 3" spacing="0"/>
</process>
</operator>
<connect from_port="input 1" to_op="Set Role" to_port="example set input"/>
<connect from_op="Set Role" from_port="example set output" to_op="Validation" to_port="training"/>
<connect from_op="Validation" from_port="averagable 1" to_port="result 1"/>
<connect from_op="Validation" from_port="averagable 2" to_port="result 2"/>
<portSpacing port="source_input 1" spacing="0"/>
<portSpacing port="source_input 2" spacing="0"/>
<portSpacing port="sink_performance" spacing="0"/>
<portSpacing port="sink_result 1" spacing="0"/>
<portSpacing port="sink_result 2" spacing="0"/>
<portSpacing port="sink_result 3" spacing="0"/>
</process>
</operator>
</process>