Table type Error in HANA Decision table

Hi,

     I need to create decision table with some rules. For that i created one table type with some columns. After that i used that table type into my decision table. When i am activating the decision table it shows the error like

Repository: Internal error during statement execution, please see the database error traces for additional details;

error in generated procedure - SqlScript:

Could not derive table type for variable "RETURNED_TT" (SQL error: insufficient privilege: Not authorized)

at ptime/query/sqlscript2/so_error.cc:27line: 0 column: 0

I don't know what the error says.Can anyone help me to find out the error.