HI Luis Fernando. You are with the more reason. I haven't tested with CRM_UI. It let me identify the errors. The first one is that in STWB_TEST ther was a bad transaction type for Test Workbench app Error. I changed the standard assigment with my ZMDT transaction type. The second mistake was that the BP were not assigned in solman for the system that I was trying to send the test case error for. I solved the last situation running BP_GEN for the users involved.
Thanks for the suggestion.