Alice 2.4 error I can not locate

[Yarnpaw]

I searched the forums before posting but none of the suggestions seemed to fix my problem. I get this error message every time I stop my world. I did not find any areas in my program with null values. I have gone through all of my methods and can not find what is causing this error message to occur. I know I must be overlooking something. I figured a second pair of eyes can spot what mine can not. I do not get this message with any of the other worlds I created. This was a world I created to practice what I learned in class.


Error during world stop.




Alice version: 2.4.3

os.name: Windows 7

os.version: 6.1

os.arch: x86

java.vm.name: Java HotSpot(TM) Client VM

java.vm.version: 20.0-b11




Throwable that caused the error:

java.lang.NullPointerException

at edu.cmu.cs.stage3.alice.core.response.CallToUserDe finedResponse$RuntimeCallToUserDefinedResponse.pro logue(CallToUserDefinedResponse.java:53)