Problem with Loop Files

ripkars

Hello everybody

I'm willing to write a process whose aim is reading all csv files from a directory and perform the very same operation on them.

I have this problem with the Loop Files operator and its subprocess.

The Loop operator looks like this
Loop [Filter: '*.csv', Directory: /home/riccardo/Workspace/unrealtournament3-dmtm2010/Training Data, File Name Macro: file_name File Path Macro: file_path etc] (the directory is made of two parts....could it be a problem? I also tried to rename it to Training_Data but hadn't got any success ... )

Inside it I have put a Read CSV operator where the File Name is set to %{file_path} (and another operator just for the sake of connecting the output somewhere).

The error I get is:
Cannot create example set meta data: Could not read file 'null': /home/riccardo/file_path (No such file or directory)..

Shouldn't RapidMiner set the value at runtime for each of the CSV file in that directory?

Why is this process broken??

(Please answer me asap as I need to finish this work by today, 23:59 UTC +01:00)

ripkars

I try to write the same file to xrff format....not working

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<process version="5.0">
  <context>
    <input/>
    <output/>
    <macros/>
  </context>
  <operator activated="true" class="process" expanded="true" name="Process">
    <parameter key="logfile" value="/home/riccardo/Workspace/unrealtournament3-dmtm2010/Processes/Log/Loop.log"/>
    <parameter key="resultfile" value="/home/riccardo/resulloop.res"/>
    <process expanded="true" height="632" width="1044">
      <operator activated="true" class="loop_files" expanded="true" height="60" name="Loop Files" width="90" x="108" y="92">
        <parameter key="directory" value="/home/riccardo/Workspace/unrealtournament3-dmtm2010/Training Data"/>
        <parameter key="filter" value="'*.csv'"/>
        <process expanded="true" height="650" width="1062">
          <operator activated="true" class="read_csv" expanded="true" height="60" name="Read CSV" width="90" x="246" y="75">
            <parameter key="file_name" value="%{file_path}.csv"/>
          </operator>
          <operator activated="true" class="write_xrff" expanded="true" height="60" name="Write XRFF" width="90" x="380" y="75">
            <parameter key="example_set_file" value="/home/riccardo/Workspace/unrealtournament3-dmtm2010/Training Data/pippo.xrff"/>
          </operator>
          <connect from_op="Read CSV" from_port="output" to_op="Write XRFF" to_port="input"/>
          <portSpacing port="source_in 1" spacing="0"/>
        </process>
      </operator>
      <portSpacing port="source_input 1" spacing="0"/>
      <portSpacing port="sink_result 1" spacing="0"/>
    </process>
  </operator>
</process>