NotOLE2FileException: Invalid header signature; read 0x0000000000000000, expected 0xE11AB1A1E011CFD0

NotOLE2FileException: Invalid header signature; read 0x0000000000000000, expected 0xE11AB1A1E011CFD0

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NotOLE2FileException: Invalid header signature; read 0x0000000000000000, expected 0xE11AB1A1E011CFD0
Tag : java , By : Milander
Date : November 24 2020, 09:00 AM

it should still fix some issue You seem to have missed some key lines of code. However, assuming you are currently doing something like:
File newFile = new File("output.xlsx");
if (!newFile.exists) { newFile.createNewFile(); }
Workbook wb = WorkbookFactory.create(newFile);
Workbook wb;
File newFile = new File("output.xlsx");
if (newFile.exists) { 
   // Load existing
   wb = WorkbookFactory.create(newFile);
} else {
   // What kind of file are they trying to ask for?
   // Add additional supported types here
   if (newFile.getName().endsWith(".xls")) {
      wb = new HSSFWorkbook();
   else if (newFile.getName().endsWith(".xlsx")) {
      wb = new XSSFWorkbook();
   else {
      throw new IllegalArgumentException("I don't know how to create that kind of new file");

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java.io.IOException: Invalid header signature; read 0x6D78204C4D54483C, expected 0xE11AB1A1E011CFD0

Tag : java , By : Adam May
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further The File you are trying to access isn't really a .xls file even though the extension may indicate that it is. Open the file in Excel and do "Save As" and then try to access the file. You should be fine. GoodLuck!

Invalid header signature; read 0x54535543092E4F4E, expected 0xE11AB1A1E011CFD0 - Your file appears not to be a valid OLE

Tag : excel , By : ack
Date : March 29 2020, 07:55 AM
wish help you to fix your issue So guys i finally found the best solutions i guess to read and import data from my Tab-separated file using openCSV library, and it goes well for all types of CSV file (Character separated value) with titles, we have just to change the separator. Here is the code:
            File xlsFile = new File(path);
            CSVReader reader = new CSVReader(new FileReader(xlsFile), '\t');
            ArrayList<String[]> data = new ArrayList<String[]>();
            String[] nextLine;
            while ((nextLine = reader.readNext()) != null) {
                final int size = nextLine.length;
                //handle empty lines
                if (size == 0) {

                String debut = nextLine[0].trim();
                if (debut.length() == 0 && size == 1) {

            String[] titles = data.get(0);

            ArrayList<Map<String, String>> mappedData = new 
            ArrayList<Map<String, String>>(data.size());

            final int titlesLength = titles.length;

            for (String[] oneData : data) {
              final Map<String, String> map = new HashMap<String, String ();
                for (int i = 0; i < titlesLength; i++) {
                    final String key = titles[i];
                    final String value = oneData[i];
                    map.put(key, value);


Excel read error : Invalid header signature. How to resolve?

Tag : java , By : Anonymous
Date : March 29 2020, 07:55 AM

NotOLE2FileException: Invalid header signature; read 0x0000000000000000, expected 0xE11AB1A1E011CFD0 - file appears not

Tag : java , By : JoeCh
Date : March 29 2020, 07:55 AM

Invalid signature. Expected signature base string, JAVA

Tag : java , By : new Blackberry devel
Date : March 29 2020, 07:55 AM
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