title: Oracle Data Pump import to a sql file error :ORA-31655 no data or metadata objects
body: <p>I'm using Data Pump to export/import data, one requirement is to import data to a sql file. The OS is window.
  I made the follow export :</p>
  
  <pre><code>expdp system/password directory=dpump_dir dumpfile=tablesdump.dmp content=DATA_ONLY tables=user.tablename
  </code></pre>
  
  <p>and it works, I can see the file TABLESDUMP.DMP in the directory path.</p>
  
  <p>then when I tried to import it to a sql file:</p>
  
  <pre><code>impdp system/password directory=dpump_dir dumpfile=tablesdump.dmp sqlfile=tables_export.sql
  </code></pre>
  
  <p>the log show :</p>
  
  <pre><code>.....
  ORA-31655 no data or metadata objects selected for job
  .....
  </code></pre>
  
  <p>and the sql file is created empty in the directory path.</p>
  
  <p>I'm not DBA, I'm a Java developer , Can you help me?</p>
  
  <p>Thks</p>