DynamicConfiguration: Null pointer?

Question

Hi, I'm using a UDF that creates a connection to our database tables to gather information to parse into a file, and this UDF createFileName, which used to work (we're implementing changes to make our UDF lookups more streamlined into 1 Java class)..
however, now I'm running test data and I keep getting this error, traced to DynamicConfiguration put(..) method.
Code:
DynamicConfiguration conf = (DynamicConfiguration) container
.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
DynamicConfigurationKey key = DynamicConfigurationKey.create("http://sap.com/xi/XI/System/File", "FileName");
String fileName = "Transaction_"siteName[0]"_"timeStamp[timeStamp.length-1]subSeqNumber.trim()+"00.csv";
conf.put(key, fileName); //traced error here
result.addValue(siteName[0]);
Error in mapping test:
Runtime exception during processing target field mapping /ns1:MT_Inventory_Tran/InventoryTran/Supplier_Site_ID. The message is: Exception:[java.lang.NullPointerException] in class com.sap.xi.tf._MM_XI_Inventory_Tran_Cust_Data_to_SUN_Inventory_Tran_ method createFileName
Thanks for any help.
Adam

Answer 1

Hi,
Check out the data you are getting and accessing those are valid...? Because this may be because you are accessing some parameters for which you are not getting values.
e.g the error is here I think: <i>Transaction_"siteName[0]"_"timeStamp[timeStamp.length-1]subSeqNumber.trim()+"00.csv</i>
TO debug more, use Display Queue option in the mapping editor so that you can see how the data is mapped..
http://help.sap.com/saphelp_nw70/helpdata/en/43/03612cdecc6e76e10000000a422035/content.htm
Rgds,
Moorthy