Need implemeation class details of IEssPerformAllocation interface

Question

Hi,
I am working on ASO Allocations through Java API.. I have the logic which uses IEssPerformAllocation interface to perform Allocation..but I do not know the implementation class of this interface to get more details about the allocation process.
my Code : IEssPerformAllocation performAlloc = cube.getPerformAllocationInstance();
Question1 : Can any body let me know the implementation class of IEssPerformAllocation interface.
I am using the below code to set all the parameters for Allocation..But I am getting the below error message:
ERROR occured in Allocation. Error: Cannot Perform Allocation. Essbase Error(1260052): Syntax error in input MDX query on line 1 at token ''
List of error/warning messages:
Error at Line 1 with argument 1, token 'null'
Question2 : Can you please let me know what will be the Argument 1 in the list of input parameters..
When I change some part of the code the argument number in the error messages will be different, and I am not able to find out for which argument it is throwing the error message..please let me know the order of the arguments?
Code:
     public static void performAllocation(IEssCube cube) throws EssException {
          // Get the IEssPerformAllocation instance
          IEssPerformAllocation performAlloc = cube.getPerformAllocationInstance();
          // Set all the parameters using the individual set methods.
          performAlloc.setPOV("[Shipping Method].FirstChild");
          performAlloc.setAmount("5000");
          performAlloc.setTarget("[Measures].FirstChild");
          performAlloc.setDebitMember("");
          performAlloc.setCreditMember("");
          performAlloc.setRange("crossjoin({Descendants( [CAT3-Snacks], [Item].Levels(2))},{crossjoin({[Org].DefaultMember},{Descendants([time].[Week Of 12/28/2009],1)})})");
          performAlloc.setBasis("");
          performAlloc.setOffset("");
          performAlloc.setAmountContext("");
          performAlloc.setAmountTimeSpan("");
          performAlloc.setTargetTimeSpan("");
          performAlloc.setTargetTimeSpanOption(IEssPerformAllocation.ESS_ASO_ALLOCATION_TIMESPAN_DIVIDEAMT);
          performAlloc.setExcludedRange("");
          performAlloc.setBasisTimeSpan("");
          performAlloc.setBasisTimeSpanOption(2);
          performAlloc.setAllocationMethod(IEssPerformAllocation.ESS_ASO_ALLOCATION_METHOD_SPREAD);
          performAlloc.setSpreadSkipOption(0);
          performAlloc.setZeroAmountOption(IEssPerformAllocation.ESS_ASO_ALLOCATION_ZEROAMT_NEXTAMT);
          performAlloc.setZeroBasisOption(IEssPerformAllocation.ESS_ASO_ALLOCATION_ZEROBASIS_NEXTAMT);
          performAlloc.setNegativeBasisOption(IEssPerformAllocation.ESS_ASO_ALLOCATION_NEGBASIS_NEXTAMT);
          performAlloc.setRoundMethod(IEssPerformAllocation.ESS_ASO_ALLOCATION_ROUND_NONE);
          performAlloc.setRoundDigits("0");
          performAlloc.setRoundToLocation("");
          performAlloc.setGroupID(0);
          runAllocation(performAlloc);
     }

Answer 1

You can check this in tcode ST06N,ST06 for time basis but for interface wise you can check user wise if uses different users for RFC connection in tcode STAD.
Thanks!