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**johnb** · 29 Jul 2010, 20:29

After pressing on with other issues for several days and running across other issues I have come to the conclusion that the above problem is probably not a SmartGWT issue but is much more likely a GWT hosted mode issue. I can only guess that this is the reason no one responded to my post. I have now come to suspect that any stacktrace that includes classes in any OOPHM related package is likely a hosted mode issue.

**jshaughn** · 7 Sep 2010, 07:43

SmartGwt 2.2 / FF 3.6.8

I'm getting a similar issue that I can't seem to get around. I have a form save operation calling the datasource add:

form.setSaveOperationType(DSOperationType.ADD);

The form.saveData() call specifies a Callback to execute after the add happens:

form.saveData(new DSCallback() {
public void execute(DSResponse dsResponse, Object o, DSRequest dsRequest)
{
...
}
});

The datasource add code succeeds but the following stack is generated, seemingly, when it tries to invoke the callback defined above:

[ERROR] com.google.gwt.core.client.JavaScriptException: (TypeError): isc_DynamicForm_1 is null
[ERROR] fileName: http://localhost:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js
[ERROR] lineNumber: 38
[ERROR] stack: anonymous([object Object],[object Array],[object Object])@http://localhost:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:38
[ERROR] isc_c_Class_fireCallback("isc_DynamicForm_1.$49z(dsRequest, dsResponse, data)","dsResponse,data,dsRequest",[object Array],[object Object],(void 0))@http://localhost:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:282
[ERROR] isc_Class_fireCallback("isc_DynamicForm_1.$49z(dsRequest, dsResponse, data)","dsResponse,data,dsRequest",[object Array])@http://localhost:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_Core.js:376
[ERROR] isc_DataSource__completeResponseProcessing([object Array],[object Object],[object Object])@http://localhost:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_DataBinding.js:527
[ERROR] isc_DataSource_processResponse("isc_UsersDataSource_0$6272",[object Object])@http://localhost:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/sc/modules/ISC_DataBinding.js:379
[ERROR] ("isc_UsersDataSource_0$6272",[object GWTJavaObject])@http://localhost:7080:495
[ERROR] @:0
[ERROR] ([object GWTJavaObject],13172737,[object XMLHttpRequest])@http://localhost:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/hosted.html?org_rhq_enterprise_gui_coregui_CoreGUI:56
[ERROR] ([object Event])@http://localhost:7080:22
[ERROR] ((function () {__gwt_makeJavaInvoke(1)(handler, 13172737, _this);}),[object XMLHttpRequest],[object Object])@http://localhost:7080:72
[ERROR] @:0
[ERROR] (null,65563,(function () {__gwt_makeJavaInvoke(1)(handler, 13172737, _this);}),[object XMLHttpRequest],[object Object])@http://localhost:7080/coregui/org.rhq.enterprise.gui.coregui.CoreGUI/hosted.html?org_rhq_enterprise_gui_coregui_CoreGUI:56
[ERROR] ([object Event])@http://localhost:7080:32
[ERROR]
[ERROR] at com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:195)
[ERROR] at com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:120)
[ERROR] at com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:507)
[ERROR] at com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:264)
[ERROR] at com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
[ERROR] at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
[ERROR] at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:188)
[ERROR] at sun.reflect.GeneratedMethodAccessor160.invoke(Unknown Source)
[ERROR] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[ERROR] at java.lang.reflect.Method.invoke(Method.java:597)
[ERROR] at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
[ERROR] at com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
[ERROR] at com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:157)
[ERROR] at com.google.gwt.dev.shell.BrowserChannel.reactToMessages(BrowserChannel.java:1668)
[ERROR] at com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:401)
[ERROR] at com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:222)
[ERROR] at java.lang.Thread.run(Thread.java:619)

Any ideas?

**Isomorphic** · 7 Sep 2010, 09:04

The previous poster mentioned it appeared to be a GWT hosted mode issue.

1. Try it in compiled mode
2. Try it with another browser
3. Be sure you're not mixing plain GWT and SmartGWT widget in an invalid way (see the FAQ)
4. Make sure you aren't calling destroy() on the form before the saving completes.

Let us know if it's still there after you've looked into all 4 of the above.

**johnb** · 8 Nov 2010, 14:56

After stepping through the obfuscated javascript I determined that the cause of my problem was that I was returning null from transformRequest. I assumed that it didn't matter since I am handling all the data movement myself. Bad choice on my part. I now return a fixed String from transformRequest in all cases and the problem has been resolved.

**ferdie_birdie** · 30 Nov 2011, 21:43

Thanks @Isomorphic.

Item#4 worked for me.

"Make sure you aren't calling destroy() on the form before the saving completes."

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After update, JavaScriptException: (TypeError): _4 is null

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