Cannot convert null to an object - How to resolve it

[arunkumar.mit]

Hi all,

I am beginner in httpunit, while getting a response from a site i am
getting the following error....

If any one got the same error or worked through it, Kindly inform me
let me how to resovle it.

Below i placed the scree shot of the error. Go through it and kindly
give suggestions.

ERROR:
TypeError: Cannot convert null to an object. (httpunit; line 56)
at
org.mozilla.javascript.NativeGlobal.constructError(NativeGlobal.java:597)
at
org.mozilla.javascript.NativeGlobal.constructError(NativeGlobal.java:557)
at
org.mozilla.javascript.NativeGlobal.typeError0(NativeGlobal.java:562)

at
org.mozilla.javascript.ScriptRuntime.toObject(ScriptRuntime.java:510)

at
org.mozilla.javascript.ScriptRuntime.toObject(ScriptRuntime.java:486)

at
org.mozilla.javascript.ScriptRuntime.getProp(ScriptRuntime.java:707)
at org.mozilla.javascript.gen.c37.call(httpunit:56)
at
org.mozilla.javascript.ScriptRuntime.call(ScriptRuntime.java:1191)
at org.mozilla.javascript.gen.c79.call(httpunit:98)
at
org.mozilla.javascript.optimizer.OptRuntime.callSimple(OptRuntime.java:275)
at org.mozilla.javascript.gen.c125.call(httpunit:0)
at org.mozilla.javascript.gen.c125.exec(httpunit)
at
org.mozilla.javascript.Context.evaluateReader(Context.java:820)
at
org.mozilla.javascript.Context.evaluateString(Context.java:784)
at
com.meterware.httpunit.javascript.JavaScript$JavaScriptEngine.executeScript(JavaScript.java:132)
at
com.meterware.httpunit.scripting.ScriptableDelegate.runScript(ScriptableDelegate.java:65)
at
com.meterware.httpunit.parsing.ScriptFilter.getTranslatedScript(ScriptFilter.java:151)
at
com.meterware.httpunit.parsing.ScriptFilter.endElement(ScriptFilter.java:131)
at org.cyberneko.html.filters.DefaultFilter.endElement(Unknown
Source)
at
org.cyberneko.html.filters.NamespaceBinder.endElement(Unknown Source)

at org.cyberneko.html.HTMLTagBalancer.callEndElement(Unknown
Source)
at org.cyberneko.html.HTMLTagBalancer.endElement(Unknown
Source)
at org.cyberneko.html.HTMLScanner$SpecialScanner.scan(Unknown
Source)
at org.cyberneko.html.HTMLScanner.scanDocument(Unknown Source)
at org.cyberneko.html.HTMLConfiguration.parse(Unknown Source)
at org.cyberneko.html.HTMLConfiguration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
at
com.meterware.httpunit.parsing.NekoHTMLParser.parse(NekoHTMLParser.java:41)
at com.meterware.httpunit.HTMLPage.parse(HTMLPage.java:255)
at
com.meterware.httpunit.WebResponse.getReceivedPage(WebResponse.java:1109)
at
com.meterware.httpunit.WebResponse.getFrames(WebResponse.java:1098)
at
com.meterware.httpunit.WebResponse.getFrameRequests(WebResponse.java:875)
at
com.meterware.httpunit.FrameHolder.updateFrames(FrameHolder.java:179)

at
com.meterware.httpunit.WebWindow.updateFrameContents(WebWindow.java:252)
at
com.meterware.httpunit.WebClient.updateFrameContents(WebClient.java:485)
at
com.meterware.httpunit.WebWindow.updateWindow(WebWindow.java:146)
at
com.meterware.httpunit.WebWindow.getSubframeResponse(WebWindow.java:130)
at
com.meterware.httpunit.WebWindow.getResponse(WebWindow.java:121)
at
com.meterware.httpunit.WebClient.getResponse(WebClient.java:113)
at Test2.main(Test2.java:17)
Exception2 : com.meterware.httpunit.ScriptException: Script
'drawLeftNavigation();' failed: TypeError: Cannot convert null to an
object. (httpunit; line 56)


Thanks
Arun.

 

[Deniz Dogan]

Hi all,

I am beginner in httpunit, while getting a response from a site i am
getting the following error....

If any one got the same error or worked through it, Kindly inform me
let me how to resovle it.

Below i placed the scree shot of the error. Go through it and kindly
give suggestions.

It would help us help you if you pasted line 56 of your file.

-Deniz Dogan