Hi,I digged around HPSF and found the following bug. Word 8.0/97 docs 
DocumentSummaryInformation have 2 sections, but getCategory() (Category is 
located within the section with index 0) (implicitly) calls GetSingleSection() 
which throws an exception if sectionCount != 1. Word 6.0/95 has single section 
and this works fine. Here's my solution to the problem until you find a better 
way... Than my class can be simply removed and everything will work ok... After 
putting the code below through this form it may need some beautifying 
(indentation)...

Regards, 
Mickey

<code>

    /**
     * This class is a manual work around HPSF
     * <NOBR>DocumentSummaryInformation.getCategory()</NOBR> bug. This method 
calls 
     * <NOBR>getProperty();</NOBR> which further calls
     * <NOBR>getSingleSection().getProperty();</NOBR>. Now, 
<NOBR>getSingleSection()</NOBR>
     * throws a <I>NoSingleSectionException</I> for <NOBR>Word 8.0/97-
2000</NOBR> documents
     * because these have two sections and only one is expected. Here's the 
stack trace: <BR>
     * <PRE>
     * org.apache.poi.hpsf.NoSingleSectionException: Property set contains 2 
sections.
     *     at org.apache.poi.hpsf.PropertySet.getSingleSection(PropertySet.java)
     *     at org.apache.poi.hpsf.SpecialPropertySet.getSingleSection
(SpecialPropertySet.java)
     *     at org.apache.poi.hpsf.PropertySet.getProperty(PropertySet.java)
     *     at org.apache.poi.hpsf.DocumentSummaryInformation.getCategory
(DocumentSummaryInformation.java)
     * </PRE>
     *
     * @author  Miroslav Obradovic (micky@eunet.yu)
     */
    public class MyDocumentSummaryInformation extends 
DocumentSummaryInformation {
        
        /**
         * Creates a DocumentSummaryInformation from a given PropertySet.
         */
        public MyDocumentSummaryInformation(final PropertySet ps) 
                throws org.apache.poi.hpsf.UnexpectedPropertySetTypeException {
            
            super(ps);
        }
        
        /**
         * Returns the stream's category (or <code>null</code>).
         */
        public String getCategory() {
            
            int pid = 
org.apache.poi.hpsf.wellknown.PropertyIDMap.PID_CATEGORY;  // equals 2
            String category = null;
            
            List sections = getSections();
            int sectionCount = (int) getSectionCount();
            org.apache.poi.hpsf.Section section = null;
            org.apache.poi.hpsf.Property[] properties = null;
            
            // Iterate through sections, get their properties and look for 
Category.
            // Category should be found in the section with index 0.
            for (int i = 0; i < sectionCount; i++) {
                
                try {
                    
                    // Get the current section.
                    section = (org.apache.poi.hpsf.Section) sections.get(i);
                    
                    // Get section properties and look for Category.
                    properties = section.getProperties();
                    for (int j = 0; j < properties.length; j++) {
                        
                        if (properties[j].getID() == pid) {
                            
                            category = (String) properties[j].getValue();
                            break;
                        }
                    }
                    
                    // If Category found, break the loop.
                    if (category != null) {
                        
                        break;
                    }
                    
                } catch (Exception e) {
                    
                    category = null;
                }
            }
            
            return category;
        }
    }
</code>