title: Tesseract invalid memory access when i am using tess4j1.3.0
body: <p>When using OCR tess4j using rest controller getting exception "java.lang.Error: Invalid memory access". Have also set the data path but as soon as i run the program it throws the above mentioned exception.
  And i have added the -Djava.jna.path with the libtesseract 302 dll. As withouth specifying the jna path i was getting "UnsatisfiedLinkError". </p>
  
  <p>My Rest Controller Code</p>
  
  <pre><code> private Logger LOGGER = LoggerFactory.getLogger(Tess4jV1.class);
  
          @Autowired
          private ImageRepository repository;
  
          @RequestMapping(value = "ocr/ping", method = RequestMethod.GET)
          public Status ping() throws Exception {
              return new Status("OK");
          }
  
          @RequestMapping(value = "ocr/v0.9/upload", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
          public Status doOcrFile(@RequestBody final Image image) throws Exception {
              // File tmpFile = File.createTempFile("ocr_image",
              // image.getExtension());
              String uplodPath = "";
              String selectedDocument = "";
  
              String OriginalFilename = "ocr_image";
  
              byte[] bytes = image.getImage();
  
              uplodPath = System.getProperty("java.io.tmpdir");
              uplodPath = uplodPath.replace("\\", "/");
              if (!uplodPath.endsWith("/"))
                  uplodPath = uplodPath + "/";
              uplodPath = uplodPath + "OCR_DMSIMGS";
              File fath = new File(uplodPath);
              if (!fath.exists())
                  fath.mkdirs();
              String fileNme = "";
              String recogniseStr = "";
              try {
                  fileNme = System.nanoTime() + OriginalFilename;
                  uplodPath = uplodPath + "/" + fileNme + image.getExtension();
                  FileOutputStream dfos = new FileOutputStream(uplodPath);
                  dfos.write(bytes);
                  dfos.close();
              } catch (Exception e) {
                  e.printStackTrace();
              }
              System.err.println(fath.getAbsolutePath());
              //
              // System.err.println(tmpFile.getAbsolutePath());
              try {
                  // FileUtils.writeByteArrayToFile(tmpFile,
                  // Base64.decodeBase64(image.getImage()));
                  Tesseract tesseract = Tesseract.getInstance(); // JNA Interface
                                                                  // Mapping
                  tesseract.setDatapath("C://Users//58181.INFOTECH//Downloads//Tess4J-1.3-src//Tess4J//tessdata");
                  ImageIO.scanForPlugins();
                  String imageText = tesseract.doOCR(new File(uplodPath));
                  LOGGER.debug("OCR Image Text = " + imageText);
              } catch (Exception e) {
                  LOGGER.error("Exception while converting/uploading image: ", e);
                  throw new TesseractException();
              } /*
                   * finally { tmpFile.delete(); }
                   */
              return new Status("success");
          }
  
          @RequestMapping(value = "ocr/v1/upload", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
          public Status doOcr(@RequestBody Image image) throws Exception {
              try {
                  // FileUtils.writeByteArrayToFile(tmpFile,
                  // Base64.decodeBase64(image.getImage()));
                  ByteArrayInputStream bis = new ByteArrayInputStream(Base64.decodeBase64(image.getImage()));
                  Tesseract tesseract = Tesseract.getInstance(); // JNA Interface
                                                                  // Mapping
                  String imageText = tesseract.doOCR(ImageIO.read(bis));
                  image.setText(imageText);
                  repository.save(image);
                  LOGGER.debug("OCR Result = " + imageText);
              } catch (Exception e) {
                  LOGGER.error("TessearctException while converting/uploading image: ", e);
                  throw new TesseractException();
              }
  
              return new Status("success");
          }
  
          @RequestMapping(value = "ocr/v1/images/users/{userId}", method = RequestMethod.GET, consumes = MediaType.APPLICATION_JSON_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
          public List&lt;Image&gt; getUserImages(@PathVariable String userId) throws Exception {
              List&lt;Image&gt; userImages = new ArrayList&lt;&gt;();
              try {
                  userImages = repository.findByUserId(userId);
              } catch (Exception e) {
                  LOGGER.error("Exception occurred finding image for userId: {} ", userId, e);
                  throw new Exception();
              }
              return userImages;
          }
  </code></pre>
  
  <p>Exception:</p>
  
  <pre><code>Adding paths from jna.library.path: C:\Users\58181.INFOTECH\Downloads\Tess4J-1.3-src\Tess4J\lib\win32-x86-64
  Trying C:\Users\58181.INFOTECH\Downloads\Tess4J-1.3-src\Tess4J\lib\win32-x86-64\libtesseract302.dll
  Found library 'libtesseract302' at C:\Users\58181.INFOTECH\Downloads\Tess4J-1.3-src\Tess4J\lib\win32-x86-64\libtesseract302.dll
  9226 [http-nio-8080-exec-2] ERROR o.a.c.c.C.[.[.[.[dispatcherServlet] - Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.Error: Invalid memory access] with root cause 
  java.lang.Error: Invalid memory access
      at net.sourceforge.tess4j.TessAPI1.TessBaseAPIInit2(Native Method)
      at net.sourceforge.tess4j.Tesseract1.init(Tesseract1.java:274)
      at net.sourceforge.tess4j.Tesseract1.doOCR(Tesseract1.java:209)
      at net.sourceforge.tess4j.Tesseract1.doOCR(Tesseract1.java:158)
      at net.sourceforge.tess4j.Tesseract1.doOCR(Tesseract1.java:142)
      at com.tess4j.rest.OcrRestController.doOcrFile(OcrRestController.java:84)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
      at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
      at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
      at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
      at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
      at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
      at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
      at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
      at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
      at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
      at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
      at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
      at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
      at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105)
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
      at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
      at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
      at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:341)
      at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
      at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
      at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
      at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
      at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
      at java.lang.Thread.run(Thread.java:748)
  </code></pre>