Database error text: invalid number

Hi Gurus,

I am calling a procedure proxy from ECC and it is giving me a short dump:

Error 339 has occurred while executing database procedure

  ""_SYS_BIC"."Krishna_Demo_Proj.Model/KC_GET_MARA"" on the

current database connection "R/3".

Database error text: invalid number: ''

Triggering statement: "dsql_open_proc"

I have created a table with only one field.

Mapped the Data types after creating the Procedure Proxy

Which data type I need to use? I tried with lots of combinations but, still the same error.

Regards,

Krishna Chauhan