title: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
body: <p>I have this strange exception saying wrong ELF class but the wrapper is set correctly.</p>
  
  <p>To read Belgiun ID card using this SDK from belgiun ID card issuers official site: <a href="http://eid.belgium.be/en/binaries/beid-sdk-3.5.3-ubuntu-9.10-i686-6193_tcm147-94066_tcm406-114986.tgz" rel="noreferrer">http://eid.belgium.be/en/binaries/beid-sdk-3.5.3-ubuntu-9.10-i686-6193_tcm147-94066_tcm406-114986.tgz</a></p>
  
  <pre><code>$ uname -a # Using NetBeans IDE 7.3 in Ubuntu 12.10 64-bit
  Linux sun-M14xR2 3.5.0-25-generic #39-Ubuntu SMP Mon Feb 25 18:26:58 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
  $ java -version
  java version "1.7.0_15"
  OpenJDK Runtime Environment (IcedTea7 2.3.7) (7u15-2.3.7-0ubuntu1~12.10.1)
  OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)
  </code></pre>
  
  <p>Code:</p>
  
  <pre><code>package javaapplication1;
  
  import java.lang.*;
  import be.belgium.eid.*;
  
  public class JavaApplication1 {
    //*****************************************************************************
    // Get the data and dump to the screen
    // Beware: The data coming from the cards is encoded in UTF8!
    //*****************************************************************************
  
    private static void getSISData(BEID_SISCard card) throws Exception {
      BEID_SisId sisId = card.getID();
  
      System.out.println();
  
      System.out.println("\tPeronal data:");
      System.out.println("\t-------------");
      System.out.println("\tName                 : " + sisId.getName());
      System.out.println("\tSurname              : " + sisId.getSurname());
      System.out.println("\tInitials             : " + sisId.getInitials());
      System.out.println("\tGender               : " + sisId.getGender());
      System.out.println("\tDateOfBirth          : " + sisId.getDateOfBirth());
      System.out.println("\tSocialSecurityNumber : " + sisId.getSocialSecurityNumber());
  
      System.out.println();
  
      System.out.println("\tCard data:");
      System.out.println("\t----------");
      System.out.println("\tLogicalNumber        : " + sisId.getLogicalNumber());
      System.out.println("\tDateOfIssue          : " + sisId.getDateOfIssue());
      System.out.println("\tValidityBeginDate    : " + sisId.getValidityBeginDate());
      System.out.println("\tValidityEndDate      : " + sisId.getValidityEndDate());
    }
  
    //*****************************************************************************
    // Get the data from a Belgian SIS card
    //*****************************************************************************
    private static void getSISCardData(BEID_ReaderContext readerContext) throws Exception {
      BEID_SISCard card = readerContext.getSISCard();
      getSISData(card);
    }
  
    //*****************************************************************************
    // Get the data and dump to the screen
    // Beware: The data coming from the cards is encoded in UTF8!
    //*****************************************************************************
    private static void getEIDData(BEID_EIDCard card) throws Exception {
      BEID_EId eid = card.getID();
  
      if (card.isTestCard()) {
        card.setAllowTestCard(true);
        System.out.println("");
        System.out.println("Warning: This is a test card.");
      }
  
      System.out.println("\tDocumentVersion    : " + eid.getDocumentVersion());
      System.out.println("\tDocumentType       : " + eid.getDocumentType());
  
      System.out.println();
  
      System.out.println("\tPeronal data:");
      System.out.println("\t-------------");
      System.out.println("\tFirstName          : " + eid.getFirstName());
      System.out.println("\tSurname            : " + eid.getSurname());
      System.out.println("\tGender             : " + eid.getGender());
      System.out.println("\tDateOfBirth        : " + eid.getDateOfBirth());
      System.out.println("\tLocationOfBirth    : " + eid.getLocationOfBirth());
      System.out.println("\tNobility           : " + eid.getNobility());
      System.out.println("\tNationality        : " + eid.getNationality());
      System.out.println("\tNationalNumber     : " + eid.getNationalNumber());
      System.out.println("\tSpecialOrganization: " + eid.getSpecialOrganization());
      System.out.println("\tMemberOfFamily     : " + eid.getMemberOfFamily());
      System.out.println("\tAddressVersion     : " + eid.getAddressVersion());
      System.out.println("\tStreet             : " + eid.getStreet());
      System.out.println("\tZipCode            : " + eid.getZipCode());
      System.out.println("\tMunicipality       : " + eid.getMunicipality());
      System.out.println("\tCountry            : " + eid.getCountry());
      System.out.println("\tSpecialStatus      : " + eid.getSpecialStatus());
  
      System.out.println("");
  
      System.out.println("\tCard data:");
      System.out.println("\t----------");
      System.out.println("\tLogicalNumber      : " + eid.getLogicalNumber());
      System.out.println("\tChipNumber         : " + eid.getChipNumber());
      System.out.println("\tValidityBeginDate  : " + eid.getValidityBeginDate());
      System.out.println("\tValidityEndDate    : " + eid.getValidityEndDate());
      System.out.println("\tIssuingMunicipality: " + eid.getIssuingMunicipality());
    }
  
    //*****************************************************************************
    // Get the data from a Belgian kids EID card
    //*****************************************************************************
    private static void getKidsCardData(BEID_ReaderContext readerContext) throws Exception {
      BEID_KidsCard card = readerContext.getKidsCard();
      getEIDData(card);
    }
  
    //*****************************************************************************
    // Get the data from a Belgian foreigner EID card
    //*****************************************************************************
    private static void getForeignerCardData(BEID_ReaderContext readerContext) throws Exception {
      BEID_ForeignerCard card = readerContext.getForeignerCard();
      getEIDData(card);
    }
  
    //*****************************************************************************
    // Get the data from a Belgian EID card
    //*****************************************************************************
    private static void getEidCardData(BEID_ReaderContext readerContext) throws Exception {
      BEID_EIDCard card = readerContext.getEIDCard();
      getEIDData(card);
    }
  
    //*****************************************************************************
    // get a string representation of the card type
    //*****************************************************************************
    private static String getCardTypeStr(BEID_ReaderContext readerContext) throws Exception {
      String strCardType = "UNKNOWN";
      BEID_CardType cardType = readerContext.getCardType();
  
      if (cardType == BEID_CardType.BEID_CARDTYPE_EID) {
        strCardType = "BEID_CARDTYPE_EID";
      } else if (cardType == BEID_CardType.BEID_CARDTYPE_KIDS) {
        strCardType = "BEID_CARDTYPE_KIDS";
      } else if (cardType == BEID_CardType.BEID_CARDTYPE_FOREIGNER) {
        strCardType = "BEID_CARDTYPE_FOREIGNER";
      } else if (cardType == BEID_CardType.BEID_CARDTYPE_SIS) {
        strCardType = "BEID_CARDTYPE_SIS";
      } else {
        strCardType = "BEID_CARDTYPE_UNKNOWN";
      }
      return strCardType;
    }
  
    //*****************************************************************************
    // Show the info of the card in the reader
    //*****************************************************************************
    private static void showCardInfo(String readerName) throws Exception {
      BEID_ReaderContext readerContext = BEID_ReaderSet.instance().getReaderByName(readerName);
      if (readerContext.isCardPresent()) {
        System.out.println("\tType               : " + getCardTypeStr(readerContext));
  
        BEID_CardType cardType = readerContext.getCardType();
  
        if (cardType == BEID_CardType.BEID_CARDTYPE_EID) {
          getEidCardData(readerContext);
        } else if (cardType == BEID_CardType.BEID_CARDTYPE_KIDS) {
          getKidsCardData(readerContext);
        } else if (cardType == BEID_CardType.BEID_CARDTYPE_FOREIGNER) {
          getForeignerCardData(readerContext);
        } else if (cardType == BEID_CardType.BEID_CARDTYPE_SIS) {
          getSISCardData(readerContext);
        } else {
        }
      }
    }
  
    //*****************************************************************************
    // Show the reader info an get the data of the card if present
    //*****************************************************************************
    private static void showReaderCardInfo(String readerName) throws Exception {
      BEID_ReaderContext readerContext = BEID_ReaderSet.instance().getReaderByName(readerName);
  
      System.out.println("Reader: " + readerName);
      System.out.println("\tCard present: " + (readerContext.isCardPresent() ? "yes" : "no"));
  
      showCardInfo(readerName);
  
      System.out.println("");
    }
  
    //*****************************************************************************
    // scan all the card readers and if a card is present, show the content of the
    // card.
    //*****************************************************************************
    private static void scanReaders() throws Exception {
      long nrReaders = BEID_ReaderSet.instance().readerCount();
      System.out.println("Nr of card readers detected: " + nrReaders);
  
      for (int readerIdx = 0; readerIdx &lt; nrReaders; readerIdx++) {
        String readerName = BEID_ReaderSet.instance().getReaderName(readerIdx);
        showReaderCardInfo(readerName);
      }
    }
  
    //*****************************************************************************
    // Main entry point
    //*****************************************************************************
    public static void main(String argv[]) {
      System.out.println("[Info]  eID SDK sample program: read_eid");
  
      String osName = System.getProperty("os.name");
  
      if (-1 != osName.indexOf("Windows")) {
        System.out.println("[Info]  Windows system!!");
        System.loadLibrary("beid35libJava_Wrapper");
      } else {
        System.loadLibrary("beidlibJava_Wrapper");
      }
  
      try {
        BEID_ReaderSet.initSDK();
        scanReaders();
      } catch (BEID_Exception e) {
        System.out.println("[Catch] BEID_Exception:" + e.GetError());
      } catch (Exception e) {
        System.out.println("[Catch] Exception:" + e.getMessage());
      }
  
  
      try {
        BEID_ReaderSet.releaseSDK();
      } catch (BEID_Exception e) {
        System.out.println("[Catch] BEID_Exception:" + e.GetError());
      } catch (Exception e) {
        System.out.println("[Catch] Exception:" + e.getMessage());
      }
    }
  }
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>[Info]  eID SDK sample program: read_eid
  Exception in thread "main" java.lang.UnsatisfiedLinkError: /home/sun/Downloads/beidsdk/beidlib/Java/unsigned/libbeidlibJava_Wrapper.so.3.5.3: /home/sun/Downloads/beidsdk/beidlib/Java/unsigned/libbeidlibJava_Wrapper.so.3.5.3: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
      at java.lang.ClassLoader$NativeLibrary.load(Native Method)
      at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1750)
      at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1675)
      at java.lang.Runtime.loadLibrary0(Runtime.java:840)
      at java.lang.System.loadLibrary(System.java:1047)
      at javaapplication1.JavaApplication1.main(JavaApplication1.java:269)
  Java Result: 1
  BUILD SUCCESSFUL (total time: 0 seconds)
  </code></pre>
  
  <p><strong>EDIT:</strong></p>
  
  <p><a href="https://code.google.com/p/eid-viewer/" rel="noreferrer">https://code.google.com/p/eid-viewer/</a>
  <a href="https://code.google.com/p/eid-mw/" rel="noreferrer">https://code.google.com/p/eid-mw/</a></p>