text mining problem

Are you sure there are tokens in your dataset that are also in your stopwords dictionary file? Is your dictionary file correctly formatted?  Are you receiving any error messages?  Do you have an example process?  The question is pretty vague right now and without more information it will probably be difficult for anyone to provide more specific guidance.

<?xml version="1.0" encoding="UTF-8"?><process version="9.7.000">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" compatibility="9.7.000" expanded="true" name="Process">
    <parameter key="logverbosity" value="init"/>
    <parameter key="random_seed" value="2001"/>
    <parameter key="send_mail" value="never"/>
    <parameter key="notification_email" value=""/>
    <parameter key="process_duration_for_mail" value="30"/>
    <parameter key="encoding" value="SYSTEM"/>
    <process expanded="true">
      <operator activated="true" class="read_excel" compatibility="9.7.000" expanded="true" height="68" name="Read Excel" width="90" x="45" y="34">
        <parameter key="excel_file" value="C:\Users\Administrator\Desktop\test.xlsx"/>
        <parameter key="sheet_selection" value="sheet number"/>
        <parameter key="sheet_number" value="1"/>
        <parameter key="imported_cell_range" value="A1"/>
        <parameter key="encoding" value="SYSTEM"/>
        <parameter key="first_row_as_names" value="true"/>
        <list key="annotations"/>
        <parameter key="date_format" value=""/>
        <parameter key="time_zone" value="SYSTEM"/>
        <parameter key="locale" value="English (United States)"/>
        <parameter key="read_all_values_as_polynominal" value="false"/>
        <list key="data_set_meta_data_information">
          <parameter key="0" value="opinion.true.polynominal.attribute"/>
          <parameter key="1" value="label.true.integer.attribute"/>
        </list>
        <parameter key="read_not_matching_values_as_missings" value="false"/>
        <parameter key="datamanagement" value="double_array"/>
        <parameter key="data_management" value="auto"/>
      </operator>
      <operator activated="true" class="nominal_to_text" compatibility="9.7.000" expanded="true" height="82" name="Nominal to Text" width="90" x="179" y="34">
        <parameter key="attribute_filter_type" value="single"/>
        <parameter key="attribute" value="opinion"/>
        <parameter key="attributes" value=""/>
        <parameter key="use_except_expression" value="false"/>
        <parameter key="value_type" value="nominal"/>
        <parameter key="use_value_type_exception" value="false"/>
        <parameter key="except_value_type" value="file_path"/>
        <parameter key="block_type" value="single_value"/>
        <parameter key="use_block_type_exception" value="false"/>
        <parameter key="except_block_type" value="single_value"/>
        <parameter key="invert_selection" value="false"/>
        <parameter key="include_special_attributes" value="false"/>
      </operator>
      <operator activated="true" breakpoints="after" class="rosette_text_toolkit:rosette_tokenize" compatibility="1.11.000" expanded="true" height="68" name="Tokenize (2)" width="90" x="313" y="34">
        <parameter key="Connection" value="NewConnection"/>
        <parameter key="Source Language" value="Persian"/>
        <parameter key="Attribute Selector" value="opinion"/>
        <parameter key="Filter stopwords" value="false"/>
      </operator>
      <operator activated="true" class="text:process_document_from_data" compatibility="9.3.001" expanded="true" height="82" name="Process Documents from Data" width="90" x="447" y="34">
        <parameter key="create_word_vector" value="true"/>
        <parameter key="vector_creation" value="TF-IDF"/>
        <parameter key="add_meta_information" value="true"/>
        <parameter key="keep_text" value="false"/>
        <parameter key="prune_method" value="none"/>
        <parameter key="prune_below_percent" value="3.0"/>
        <parameter key="prune_above_percent" value="30.0"/>
        <parameter key="prune_below_rank" value="0.05"/>
        <parameter key="prune_above_rank" value="0.95"/>
        <parameter key="datamanagement" value="double_sparse_array"/>
        <parameter key="data_management" value="auto"/>
        <parameter key="select_attributes_and_weights" value="true"/>
        <list key="specify_weights">
          <parameter key="Token" value="1.0"/>
        </list>
        <process expanded="true">
          <operator activated="true" class="open_file" compatibility="9.7.000" expanded="true" height="68" name="Open File" width="90" x="112" y="187">
            <parameter key="resource_type" value="file"/>
            <parameter key="filename" value="C:/Users/Administrator/Desktop/stopwords.txt"/>
          </operator>
          <operator activated="true" class="text:filter_stopwords_dictionary" compatibility="9.3.001" expanded="true" height="82" name="Filter Stopwords (Dictionary)" width="90" x="246" y="34">
            <parameter key="file" value="C:\Users\lione\Downloads\stopwords.txt"/>
            <parameter key="case_sensitive" value="false"/>
            <parameter key="encoding" value="SYSTEM"/>
          </operator>
          <connect from_port="document" to_op="Filter Stopwords (Dictionary)" to_port="document"/>
          <connect from_op="Open File" from_port="file" to_op="Filter Stopwords (Dictionary)" to_port="file"/>
          <connect from_op="Filter Stopwords (Dictionary)" from_port="document" to_port="document 1"/>
          <portSpacing port="source_document" spacing="0"/>
          <portSpacing port="sink_document 1" spacing="0"/>
          <portSpacing port="sink_document 2" spacing="0"/>
        </process>
      </operator>
      <connect from_op="Read Excel" from_port="output" to_op="Nominal to Text" to_port="example set input"/>
      <connect from_op="Nominal to Text" from_port="example set output" to_op="Tokenize (2)" to_port="example set"/>
      <connect from_op="Tokenize (2)" from_port="example set" to_op="Process Documents from Data" to_port="example set"/>
      <connect from_op="Process Documents from Data" from_port="example set" to_port="result 1"/>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
      <portSpacing port="sink_result 2" spacing="0"/>
    </process>
  </operator>
</process>

@sara20 ahan moshkeletoon bakhshe tokenization hast? baraye tokenization tooye farsi man ye extension nasb kardam be name rosette extension emkanesh hast oono nasb konin bebinin irade karam az chie?man taghriban kole in anjoman ro ziro roo kardam