Error on Loop

Support
1

Dear Sirs/Madam,
I am currently working on a form which does:

  1. Ask if there are mosquito nets in the household (select1 question,
    YES/NO)
  2. Ask for the number of mosquito nets (int) (relevant if answer to above
    is YES)
  3. Loop for each mosquito net (using the above answer to inform jr:count)
    • Ask mosquito net specific questions.

If the fieldworker goes through the process in a linear fashion (no going
back to amend previous answers) there is no problem. However if the user
goes from step 1-3, then suddenly goes back to step 1 and change the
response from YES to NO (rendering step two irrelevant), there is a crash,
stack trace below:

09-12 13:29:10.480: E/InputEventReceiver(13233): Exception dispatching
input event.
09-12 13:29:10.480: E/MessageQueue-JNI(13233): Exception in MessageQueue
callback: handleReceiveCallback
09-12 13:29:10.490: E/MessageQueue-JNI(13233):
java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
java.util.Vector.arrayIndexOutOfBoundsException(Vector.java:907)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
java.util.Vector.elementAt(Vector.java:328)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.xpath.XPathNodeset.getRefAt(XPathNodeset.java:54)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.xpath.expr.XPathFuncExpr.eval(XPathFuncExpr.java:185)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.xpath.XPathConditional.evalRaw(XPathConditional.java:68)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.condition.Recalculate.eval(Recalculate.java:53)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.condition.Triggerable.apply(Triggerable.java:69)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.FormDef.evaluateTriggerable(FormDef.java:708)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.FormDef.evaluateTriggerables(FormDef.java:698)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.FormDef.triggerTriggerables(FormDef.java:671)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.FormDef.setValue(FormDef.java:305)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.form.api.FormEntryController.commitAnswer(FormEntryController.java:155)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.form.api.FormEntryController.answerQuestion(FormEntryController.java:92)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.logic.FormController.answerQuestion(FormController.java:406)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.logic.FormController.saveAllScreenAnswers(FormController.java:677)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.activities.FormEntryActivity.saveAnswersForCurrentScreen(FormEntryActivity.java:804)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.activities.FormEntryActivity.showNextView(FormEntryActivity.java:1166)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.activities.FormEntryActivity.onFling(FormEntryActivity.java:2467)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.GestureDetector.onTouchEvent(GestureDetector.java:609)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.activities.FormEntryActivity.dispatchTouchEvent(FormEntryActivity.java:1149)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1914)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.View.dispatchPointerEvent(View.java:7564)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3883)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3778)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5419)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5399)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5370)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5493)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:182)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.os.MessageQueue.nativePollOnce(Native Method)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.os.MessageQueue.next(MessageQueue.java:132)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.os.Looper.loop(Looper.java:124)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.app.ActivityThread.main(ActivityThread.java:5103)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
java.lang.reflect.Method.invokeNative(Native Method)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
java.lang.reflect.Method.invoke(Method.java:525)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
dalvik.system.NativeStart.main(Native Method)

I believe this is because the jr:count value for the question 3 loop
changes because question 2 is no longer relevant. Does anyone have a
suggestion how this could be implemented? I was trying to do an

PSEUDOCODE:
If(selected(qtn1,'NO') then currentNode=0, else currentNode==userInput)
ACTUAL CODE:
<bind nodeset="/form/agepassed/q23"
calculate="if(selected(/form/agepassed/q22, '0') , 0,'/form/agepassed/q23)"
... />

This resulted in cyclic dependency errors due to the ELSE part of the
conditional. In reality I only want the IF-THEN, I dont need the ELSE..

<bind nodeset="/form/agepassed/q23"
calculate="if(selected(/form/agepassed/q22, '0') , 0)" ... />

But javarosa syntax insists on the ELSE clause.

Any help greatly appreciated

Tumaini

2

This is likely related to other recently-reported issues with repeat groups
not adjusting for changes in the repeat-count value.

I've created this issue and added you for CC's of updates to it:
http://code.google.com/p/opendatakit/issues/detail?id=913

ยทยทยท On Thu, Sep 12, 2013 at 6:45 AM, Tumaini Kilimba wrote:

Dear Sirs/Madam,
I am currently working on a form which does:

  1. Ask if there are mosquito nets in the household (select1 question,
    YES/NO)
  2. Ask for the number of mosquito nets (int) (relevant if answer to above
    is YES)
  3. Loop for each mosquito net (using the above answer to inform jr:count)
    • Ask mosquito net specific questions.

If the fieldworker goes through the process in a linear fashion (no going
back to amend previous answers) there is no problem. However if the user
goes from step 1-3, then suddenly goes back to step 1 and change the
response from YES to NO (rendering step two irrelevant), there is a crash,
stack trace below:

09-12 13:29:10.480: E/InputEventReceiver(13233): Exception dispatching
input event.
09-12 13:29:10.480: E/MessageQueue-JNI(13233): Exception in MessageQueue
callback: handleReceiveCallback
09-12 13:29:10.490: E/MessageQueue-JNI(13233):
java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
java.util.Vector.arrayIndexOutOfBoundsException(Vector.java:907)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
java.util.Vector.elementAt(Vector.java:328)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.xpath.XPathNodeset.getRefAt(XPathNodeset.java:54)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.xpath.expr.XPathFuncExpr.eval(XPathFuncExpr.java:185)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.xpath.XPathConditional.evalRaw(XPathConditional.java:68)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.condition.Recalculate.eval(Recalculate.java:53)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.condition.Triggerable.apply(Triggerable.java:69)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.FormDef.evaluateTriggerable(FormDef.java:708)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.FormDef.evaluateTriggerables(FormDef.java:698)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.FormDef.triggerTriggerables(FormDef.java:671)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.core.model.FormDef.setValue(FormDef.java:305)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.form.api.FormEntryController.commitAnswer(FormEntryController.java:155)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.javarosa.form.api.FormEntryController.answerQuestion(FormEntryController.java:92)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.logic.FormController.answerQuestion(FormController.java:406)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.logic.FormController.saveAllScreenAnswers(FormController.java:677)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.activities.FormEntryActivity.saveAnswersForCurrentScreen(FormEntryActivity.java:804)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.activities.FormEntryActivity.showNextView(FormEntryActivity.java:1166)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.activities.FormEntryActivity.onFling(FormEntryActivity.java:2467)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.GestureDetector.onTouchEvent(GestureDetector.java:609)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
org.odk.collect.android.activities.FormEntryActivity.dispatchTouchEvent(FormEntryActivity.java:1149)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1914)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.View.dispatchPointerEvent(View.java:7564)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:3883)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:3778)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:3483)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:3540)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3429)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3398)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3406)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3379)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:5419)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:5399)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:5370)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:5493)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:182)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.os.MessageQueue.nativePollOnce(Native Method)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.os.MessageQueue.next(MessageQueue.java:132)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.os.Looper.loop(Looper.java:124)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
android.app.ActivityThread.main(ActivityThread.java:5103)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
java.lang.reflect.Method.invokeNative(Native Method)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
java.lang.reflect.Method.invoke(Method.java:525)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-12 13:29:10.490: E/MessageQueue-JNI(13233): at
dalvik.system.NativeStart.main(Native Method)

I believe this is because the jr:count value for the question 3 loop
changes because question 2 is no longer relevant. Does anyone have a
suggestion how this could be implemented? I was trying to do an

PSEUDOCODE:
If(selected(qtn1,'NO') then currentNode=0, else currentNode==userInput)
ACTUAL CODE:
<bind nodeset="/form/agepassed/q23"
calculate="if(selected(/form/agepassed/q22, '0') , 0,'/form/agepassed/q23)"
... />

This resulted in cyclic dependency errors due to the ELSE part of the
conditional. In reality I only want the IF-THEN, I dont need the ELSE..

<bind nodeset="/form/agepassed/q23"
calculate="if(selected(/form/agepassed/q22, '0') , 0)" ... />

But javarosa syntax insists on the ELSE clause.

Any help greatly appreciated

Tumaini

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