Create a member in a given file?

[Thorbjørn Ravn Andersen <thunderaxiom@xxxxxxxxx>]

I need to create a member in a file. 

I have the full name of the member file in an IFSFile object (i.e. 
/QSYS.LIB/XQ41EXI01.LIB/EDIPOMATCE.FILE/MACT9S0BYG.MBR) and I intend to 
open it as a SequentialFile, create a Record per line and put in the 
data I need, and write it to the SequentialFile. 

Currently my code looks pretty much like:

----
       IFSFile logMember = new IFSFile(system, 
logFile.getAbsolutePath() + "/" + member.getName());
      
       if (logMember.exists()) {
           throw new IllegalStateException("Member already exists in 
error file " + logMember);
       }

       SequentialFile sequentialFile = 
getSequentialFileWithRecordFormatSet(system, logMember.getAbsolutePath());
       sequentialFile.open();
       sequentialFile.positionCursorAfterLast();
      
       Record record1 = sequentialFile.getRecordFormat().getNewRecord();
       record1.setField(0, "UNB01PEVRETUR");
       sequentialFile.write(record1);
--.-. where getSequentialFile looks like

   private SequentialFile getSequentialFileWithRecordFormatSet(AS400 
system, String absolutePath) throws AS400Exception, 
AS400SecurityException, InterruptedException, IOException, 
PropertyVetoException {
       AS400FileRecordDescription recordDescription = new 
AS400FileRecordDescription( system, absolutePath);

       SequentialFile sequentialFile = new SequentialFile(system, 
absolutePath);
       RecordFormat[] retrieveRecordFormat = 
recordDescription.retrieveRecordFormat();
       if (retrieveRecordFormat.length != 1) {
           log.warn("file does not have exactly one member: " + 
absolutePath);
       }
       RecordFormat recordFormat = retrieveRecordFormat[0];
       sequentialFile.setRecordFormat(recordFormat);
       return sequentialFile;
   }

------

This is very similar to what I do when reading from a member, but the 
only create method I can find creates the sequentialFile, not the 
member.  Apparently "create member" is not the right term to search for 
either in google or the toolbox manual, so I am a bit lost now.  I don't 
grok Cobol, so I have no idea what it might be called instead.

I would appreciate a gentle hint in the right direction.

Best regards,