"Project ID is invalid"error in PA_BUDGET_PUB.create_draft_budget

Hello,

i am getting "Project ID is invalid"error when attempting to create draft budget using "PA_BUDGET_PUB.create_draft_budget" api,even though i am passing valid project ID, below is my sample code:

DECLARE

l_api_version              NUMBER        := 1.0;

l_commit                   VARCHAR2(1)   := 'F';

l_init_msg_list            VARCHAR2(1)   := 'F';

l_msg_count                NUMBER;

l_msg_data                 VARCHAR2(2000);

l_return_status            VARCHAR2(1);

l_pm_product_code          VARCHAR2(10)  := 'PJM';

l_loop_cnt                 NUMBER;

l_dummy_cnt                NUMBER;

v_status                   VARCHAR2(1);

l_budget_lines_in          pa_budget_pub.budget_line_in_tbl_type;

l_budget_lines_in_rec      pa_budget_pub.budget_line_in_rec_type;