Media Error in Live Server

Good morning from Gran Canaria.

I have just uploaded a solution to my test server and I have an error in the server log. It does not happen from Servoy Developer, only in the server.

It is produced when I try to change the imageURL property in a label. It is a media to indicate that a button is not selected so all the labels have that button as default imageMedia property. When the user changes the option, click another option button, the last selected gets the default imageURL and the new one gets the selected imageURL.

When the form is first shown all the buttons are properly shown, but as the solution selects a button by default I get the error in the server log.

Here is the error:

Time	Thread	Level	Category	Message	ClientId	Solution Name
2012-01-07 09:08	http-80-1	ERROR	com.servoy.j2db.util.Debug	Throwable	B53AC51B-C959-4976-91AE-D3ED7969AAF2	D2Mediator
org.mozilla.javascript.EcmaError: TypeError: Cannot set property "imageURL" of to "media:///TabGreen.png" (selectTab#75) 
    	at org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3662) 
    	at org.mozilla.javascript.ScriptRuntime.constructError(ScriptRuntime.java:3656) 
    	at org.mozilla.javascript.ScriptRuntime.typeError(ScriptRuntime.java:3667) 
    	at org.mozilla.javascript.ScriptRuntime.typeError3(ScriptRuntime.java:3691) 
    	at org.mozilla.javascript.ScriptRuntime.undefWriteError(ScriptRuntime.java:3711) 
    	at org.mozilla.javascript.ScriptRuntime.setObjectProp(ScriptRuntime.java:1518) 
    	at org.mozilla.javascript.Interpreter.interpretLoop(Interpreter.java:3355) 
    	at script.selectTab(selectTab:75) 
    	at script.onShow(onShow:11) 
    	at org.mozilla.javascript.Interpreter.interpret(Interpreter.java:2680) 
    	at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:166) 
    	at org.mozilla.javascript.ContextFactory.doTopCall(ContextFactory.java:387) 
    	at org.mozilla.javascript.ScriptRuntime.doTopCall(ScriptRuntime.java:3134) 
    	at org.mozilla.javascript.InterpretedFunction.call(InterpretedFunction.java:165) 
    	at com.servoy.j2db.scripting.ScriptEngine.executeFunction(ScriptEngine.java:528) 
    	at com.servoy.j2db.FormController.executeFunction(FormController.java:4058) 
    	at com.servoy.j2db.FormController.executeFormMethod(FormController.java:4375) 
    	at com.servoy.j2db.FormController.executeOnShowMethod(FormController.java:4254) 
    	at com.servoy.j2db.FormController.access$16(FormController.java:4245) 
    	at com.servoy.j2db.FormController$3.run(FormController.java:3106) 
    	at com.servoy.j2db.server.headlessclient.WebClient.executeEvents(WebClient.java:507) 
    	at com.servoy.j2db.server.headlessclient.WebClient.executeEvents(WebClient.java:519) 
    	at com.servoy.j2db.server.headlessclient.WebClientsApplication$5.respond(WebClientsApplication.java:408) 
    	at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1260) 
    	at org.apache.wicket.RequestCycle.step(RequestCycle.java:1331) 
    	at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1438) 
    	at org.apache.wicket.RequestCycle.request(RequestCycle.java:546) 
    	at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486) 
    	at com.servoy.j2db.server.servlets.Zl.doGet(Zl.java:14) 
    	at org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:138) 
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) 
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) 
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) 
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 
    	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:554) 
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298) 
    	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859) 
    	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588) 
    	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489) 
    	at java.lang.Thread.run(Unknown Source)
2012-01-07 09:08	http-80-1	ERROR	com.servoy.j2db.util.Debug	TypeError: Cannot set property "imageURL" of to "media:///TabGreen.png" (selectTab#75)	B53AC51B-C959-4976-91AE-D3ED7969AAF2	D2Mediator

Anyone can please give me a clue?