Getting Data from Input Structure (in Web Dynpro)

Question

Hi All,
in my Web Dynpro Application, i have problems to get the data form my Input-Structure. In the execution-method I implement the following code, to show the input parameters in my form (in context-nodes):
IGPStructure inputStructure = executionContext.getInputStructure;
node.setSolution((String)inputStructure.getStructure("FRS").getAttribute("Solution"));
But that doesnt work I, my exception handler throws an exception. Exception.getMessage() returns null, so I cannot show the error-message. What is the problem?
Hope someone can help me.
Really thanks
Bye Steve

Answer 1

I solved it my own.
It was an Null-Pointer exception, cause getStructure can also return null, when no structure is added.
In my code I didnt catch null-structures, result was the error message.
Right code example:
IGPStructure inputStructure = executionContext.getInputStructure.getStructure("FRS");
if(inputStructure != null){
    node.setSolution((String)inputStructure.getAttribute("Solution"));