We have a bit more complex excel workbook, which we need to access. When 
accessing the workbook (new HSSFWorkbook(.)), the exception below is thrown. I 
found out that this happens, while the workbook is processed / read out and 
that on two different pages of the workbook (manually modified), the following 
section causes the exception if the value of 'rectype' is 93:



Throwing code section:
***********************
Class:  RecordFactory.java
Method: createRecord
Condition to fail: rectype == 93
Code:
retval = ( Record ) constructor.newInstance(new Object[]
{
   new Short((short)rectype), new Short(size), data
});


Thrown Exception:
******************
java.lang.reflect.InvocationTargetException
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown 
Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at org.apache.poi.hssf.record.RecordFactory.createRecord
(RecordFactory.java:232)
	at org.apache.poi.hssf.record.RecordFactory.createRecords
(RecordFactory.java:160)
	at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>
(HSSFWorkbook.java:165)
	at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>
(HSSFWorkbook.java:132)
	at ScsRalfImporter.<init>(ScsRalfImporter.java:33)
	at ScsRalfImporter.main(ScsRalfImporter.java:66)
Caused by: java.lang.ArrayIndexOutOfBoundsException
	at java.lang.System.arraycopy(Native Method)
	at org.apache.poi.hssf.record.UnknownRecord.<init>
(UnknownRecord.java:62)
	at org.apache.poi.hssf.record.SubRecord.createSubRecord
(SubRecord.java:57)
	at org.apache.poi.hssf.record.ObjRecord.fillFields(ObjRecord.java:99)
	at org.apache.poi.hssf.record.Record.fillFields(Record.java:90)
	at org.apache.poi.hssf.record.Record.<init>(Record.java:55)
	at org.apache.poi.hssf.record.ObjRecord.<init>(ObjRecord.java:61)
	... 10 more
org.apache.poi.hssf.record.RecordFormatException: Unable to construct record 
instance, the following exception occured: null
	at org.apache.poi.hssf.record.RecordFactory.createRecord
(RecordFactory.java:246)
	at org.apache.poi.hssf.record.RecordFactory.createRecords
(RecordFactory.java:160)
	at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>
(HSSFWorkbook.java:165)
	at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>
(HSSFWorkbook.java:132)
	at ScsRalfImporter.<init>(ScsRalfImporter.java:33)
	at ScsRalfImporter.main(ScsRalfImporter.java:66)
Exception in thread "main"