Hi Artur,
For this error, you should check table bbp_locmap in SRM side for the plant in ECC PR.
Please make sure there is one correct entry for this plant with correct logical system.
If this entry is incorrect, you should upload plant from ECC to SRM with the following reports:
BBP_LOCATIONS_GET_ALL
BBP_LOCATIONS_GET_SELECTED
If the entry is correctly maintained, I suggest you debug the transfer process and set break point at:
=====
In program LBBP_BD_VALUE_MAPPINGF11
* Map external location id to internal
IF cs_partner-ext_partner_pft = c_location.
MOVE cs_partner-partner_id TO lv_location.
CALL FUNCTION 'BBP_LOCATION_BY_PLANT'
EXPORTING
iv_plant = lv_location
iv_logsys = cs_partner-partner_src_sys
IMPORTING
ev_location = lv_partner.
=====
Hope this helps.
Best regards,
Ivy