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You'll have to be more specific. I followed the procedure in your "How to use macros.txt" file.

Here is what my "Module1.xba" file looks like when I copy and paste the macro:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE script:module PUBLIC "-//OpenOffice.org//DTD OfficeDocument 1.0//EN" "module.dtd">
<!--
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
-->
<script:module xmlns:script="http://openoffice.org/2000/script" script:name="Module1" script:language="StarBasic">REM  *****  BASIC  *****

Sub LosslessCompressionPdf(cFile)

  Dim oPropertyValue As new com.sun.star.beans.PropertyValue
  Dim oPropertyData As new com.sun.star.beans.PropertyValue
  Dim oPropertyDataValue As new com.sun.star.beans.PropertyValue

  cURL = convertToURL(cFile)

  oPropertyValue.Name = &quot;Hidden&quot;
  oPropertyValue.Value =  True
  oDoc = StarDesktop.loadComponentFromURL(cURL, &quot;_blank&quot;, 0, Array(oPropertyValue))

  dispatcher = createUnoService(&quot;com.sun.star.frame.DispatchHelper&quot;)
  dispatcher.executeDispatch(oDoc.CurrentController.Frame, &quot;.uno:UpdateAllIndexes&quot;, &quot;&quot;, 0, Array())

  GlobalScope.BasicLibraries.LoadLibrary(&quot;Tools&quot;)
  cFileNew = Tools.Strings.GetFileNameWithoutExtension(cFile) + &quot;.pdf&quot;
  cURL = ConvertToURL(cFileNew)

  oPropertyValue.Name = &quot;FilterName&quot;
  oPropertyValue.Value =  &quot;writer_pdf_Export&quot;

  oPropertyDataValue.Name = &quot;UseLosslessCompression&quot;
  oPropertyDataValue.Value =  1
  oPropertyData.Name = &quot;FilterData&quot;
  oPropertyData.Value = Array(oPropertyDataValue)

  oDoc.storeToURL(cURL, Array(oPropertyValue, oPropertyData))

  oDoc.close(True)

End Sub
</script:module>

It still doesn't work.