It's because there is nothing else in the log related to this issue :/ I can visualise the structure and the only problem is about searching OU Data in the OrgUnit Listing part.
I have compared the /NAKISA/OC_OU_LISTING function which is used by NAKISA on R3 System with same parameters and I am having all the OU data outcome completely with all the related details such as manager name, OU_ID etc.. When I made a RFC Trace on Admin Console and output part of the returned data was all empty.
I haven't changed any standart customization in the Admin Console part and I am using it as it is. What could be the problem ?
Regards.