Hi Artur ,
Saw some earlier threads . Check each of these points carefully and respond back .
1. The reason was could be the logical system that we used for ERP in SRM was different that the one we had in ERP system. Please compare entry from ERP transaction SCC4 field 'Logical system' with the one you have defined in SRM SPRO 'Define backend systems
2. When you execute the report "BBP_EXTREQ_TRANSFER" to transfer PR's to SRM system,the entry gets deleted from the table EPRTRANS.EPRTRANS contains the PR netry which needs to be transferred on execution of the above report.
3. Please check if your plant is already created in the table BBP_LOCMAP and has proper business partner
4. Note 801133 - Interface used to transfer external requirements is adjusted
5. Make sure you convert your RFC user as a dialog user and then integrate him into the entry channel. Once you are done with that you can convert that user back into a system user.
Make sure this user has highest authorities and then you will see all you requisitions flow from R/3 to SRM i.e. The RFC User is maintained in both systems with profiles S_A.SYSTEM and SAP_ALL.
When there is some inconsistency with RFC user (address, attributes etc) which can be checked using BBP_BP_OM_INTEGRATE
6. Entry Channel is assigned in the responsibility tab of the concerned P.Group.
7. Also ensure all the inbound and outbound queues in SRM & R/3 are cleared before the transfer of P.R to SRM side.