Automatic version creation - ERROR: Item version XXXX does not exists

Hi PPM Experts,

System: PPM 6.0

Requirement:

Item and project version(snapshot) has to be generated automatically whenever the user change the item decision point status.

Solution:

Implemented the BADI /RPM/DECISION_POINT=>PREPARE_TO_SAVE

Calling static class to generate version:   /rpm/cl_item_d_api=>create_items_version

Problem:

Item version is generated successfully but project version is not. It throw's errors as below.

"Item version XXXX does not exists."

"Snapshot version could not be created"

code:

CALL FUNCTION 'NUMBER_GET_NEXT'

                        EXPORTING

                          nr_range_nr             = lv_number_range

                          object                  = ' DPR_VRSN'

                        IMPORTING

                          number                  = lv_hdr_verid

                        EXCEPTIONS

                          interval_not_found      = 1

                          number_range_not_intern = 2

                          object_not_found        = 3

                          quantity_is_0           = 4

                          quantity_is_not_1       = 5

                          interval_overflow       = 6

                          buffer_overflow         = 7

                          OTHERS                  = 8.

/rpm/cl_item_d_api=>create_items_version(

                               EXPORTING

                                 it_item_guids           = lt_itemguid

                                 iv_version_type         = lc_snapst

                                 iv_vers_hdr_name        = lv_hdr_verid

                                 iv_cp_version_name      = lv_hdr_verid

                                 iv_vers_hdr_description = lv_verdes

                                  ).

The version has to generate for an item along with the project.

Kindly help me to resolve this issue.