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Another error we see sometimes: (in this case trying to force a point read) ERROR 2017-02-28 21:22:56,224 (com.serotonin.m2m2.web.dwr.util.ExceptionDetectionFilter.doFilter:38) - DWR invocation exception java.lang.ClassCastException: com.serotonin.bacnet4j.transport.ServiceFutureImpl cannot be cast to com.serotonin.bacnet4j.service.acknowledgement.ReadPropertyAck at com.serotonin.ma.bacnet.BACnetDataSourceRT.forcePointRead(BACnetDataSourceRT.java:373) at com.serotonin.m2m2.rt.RuntimeManager.forcePointRead(RuntimeManager.java:650) at com.serotonin.m2m2.web.dwr.BaseDwr.forcePointRead(BaseDwr.java:278) 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.directwebremoting.impl.ExecuteAjaxFilter.doFilter(ExecuteAjaxFilter.java:34) at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:428) at com.serotonin.m2m2.web.dwr.util.TranslationsFilter.doFilter(TranslationsFilter.java:37) at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:428) at com.serotonin.m2m2.web.dwr.util.ExceptionDetectionFilter.doFilter(ExceptionDetectionFilter.java:26) at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:428) at com.serotonin.m2m2.web.dwr.util.DwrPermissionFilter.doFilter(DwrPermissionFilter.java:45) at org.directwebremoting.impl.DefaultRemoter$1.doFilter(DefaultRemoter.java:428) at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:431) at org.directwebremoting.impl.DefaultRemoter.execute(DefaultRemoter.java:283) at org.directwebremoting.servlet.PlainCallHandler.handle(PlainCallHandler.java:52) at org.directwebremoting.servlet.UrlProcessor.handle(UrlProcessor.java:101) at org.directwebremoting.servlet.DwrServlet.doPost(DwrServlet.java:146) at javax.servlet.http.HttpServlet.service(HttpServlet.java:707) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:808) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1669) at org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:83) at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:300) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.springframework.web.filter.ShallowEtagHeaderFilter.doFilterInternal(ShallowEtagHeaderFilter.java:87) at com.serotonin.m2m2.web.filter.MangoShallowEtagHeaderFilter.doFilterInternal(MangoShallowEtagHeaderFilter.java:47) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585) 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.ContextHandlerCollection.handle(ContextHandlerCollection.java:215) 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:310) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257) at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635) at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555) at java.lang.Thread.run(Thread.java:745)

Make sure you set the 'Accepts' header to application/json. It's possible that Mango can't figure out what type of response you want.

Hmmm, ok. Thanks for the fast response. How is it then, that virtual points can be written with the publisher? Also, we tested one more thing: we had our modbus point A we created a virtual data point VirtA we created two 'onchange' point links, A->VirtA and VirtA->A voilá, it worked, point A could be written using the bacnet publisher! (it also worked using a metapoint and a single pointlink) thoughts?

I'm having a problem with my modbus datasource, in the point locator part of th ui, specifically in the write part, it works sometimes, i suspect that there's a bug and the frame doesn't use some parameter of the datasource config, guessing even more could be the command batch option, because the device I'm testing doesn't support the write batch command. I've put together a simple video showing the bug, writing the point from the watchlist or the main datapoint window works just fine, but trying to write from the point locator windows, throws "no response" although I've seen it working before (with another device, but same software version). [flash]http://www.youtube.com/embed/B61Mmtkgwsw[/flash] http://youtu.be/B61Mmtkgwsw Running on the mangoes, core v2.4.2, modbus v1.4.8. Regards PD.: The forum youtube tag doesn't seem to work.

That is very odd, I'm really not sure why you are getting that. We made lots of improvements to the BACnet module in this version and it seems to be very stable in all our testing and usage.