# After packaging locally with the latest code, an error like this appears when running refine.bat

**URL:** <https://forum.openrefine.org/t/after-packaging-locally-with-the-latest-code-an-error-like-this-appears-when-running-refine-bat/971>\
**Category:** Support and Helpdesk\
**Created:** [September 13, 2023, 2:34am UTC](https://forum.openrefine.org/t/after-packaging-locally-with-the-latest-code-an-error-like-this-appears-when-running-refine-bat/971 "2023-09-13T02:34:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![zhenghao\_jiang](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.openrefine.org/zhenghao_jiang/32/626_2.png) [@zhenghao\_jiang](https://forum.openrefine.org/u/zhenghao_jiang)\
**Post date:** [September 13, 2023, 2:34am UTC](https://forum.openrefine.org/t/after-packaging-locally-with-the-latest-code-an-error-like-this-appears-when-running-refine-bat/971/1 "2023-09-13T02:34:28Z")

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[Http://127.0.0.1:3333](Http://127.0.0.1:3333)  
version:3.8  
error result:

## HTTP ERROR 404

Problem accessing /. Reason:

Not Found

### Caused by:

javax.servlet.UnavailableException: Could not instantiate class com.google.refine.RefineServlet at org.eclipse.jetty.servlet.ServletHolder.ensureInstance(ServletHolder.java:769) at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:752) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:582) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at com.google.refine.ValidateHostHandler.handle(ValidateHostHandler.java:91) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97) at org.eclipse.jetty.server.Server.handle(Server.java:499) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:258) at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635) at java.base/java.lang.Thread.run(Thread.java:833)

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<div class="post-metadata">

**Author:** ![antonin\_d](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.openrefine.org/antonin_d/32/32_2.png) [@antonin\_d](https://forum.openrefine.org/u/antonin_d)\
**Post date:** [September 13, 2023, 4:22am UTC](https://forum.openrefine.org/t/after-packaging-locally-with-the-latest-code-an-error-like-this-appears-when-running-refine-bat/971/2 "2023-09-13T04:22:01Z")

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Which command(s) did you run to package locally?  
Sometimes it helps running `mvn clean` before compiling, in case you have reached a partially compiled state before.