RFC Prerequisites (SAP Solution Manager)
In order for the transport requests to be created you have to make sure that the necessary RFC connections to the managed system exist.
Open transaction SOLMAN_SETUP
Navigate to Managed Systems Configuration
Select the system you want to connect as a check on the RFC status
If the RFCs have not been created, select the system and open Configure System
Navigate to sub-section Maintain RFCs
Switch to Edit Mode at the top of the page
Scroll down to section RFC - Standard Mode and check all the creation check boxes and hit Execute
Verify
In transaction SM59 you should see the created RFC connections to the managed system in the section ABAP Connections
In “LMDB → Technical Systems → <System> → Destinations” you can verify that the RFC Destinations are registered.
Please also check that the transport domain is registered in “LMDB → Transport Domains”. If this is not the case, you have to check, that the domain controller is sending its data to the SLD (transaction RZ70) and that the LMDB is collecting the data from the SLD. You can trigger the synchronization manually if needed.
Analysis
If you are facing issues detecting and using RFC destinations, you should have a look at “STMS → Monitor → TMS Alert Viewer”. A breakpoint in class CL_CTS_TMS_CI_TARGET could help too.