Null Pointer Exception: Dynamic Configuration

Hi,

I am getting a null pointer exception in dynamic configuration

Below is the screenshot of input queue and error.

Code:

DynamicConfiguration conf = (DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);

DynamicConfigurationKey key = DynamicConfigurationKey.create("http:/" + "/sap.com/xi/XI/System/File","FileName");

conf.put(key,strCompCodeDesc);

return strCompCodeDesc;

Please guide.

Thanks & Regards,

Nida