Hi, I have a problem when inserting embedded beams.(Errore 247)

Hi, I have a problem when inserting embedded beams.
If I do the analysis with the K0 but without the embedded beam it doesn't create any problem for me. But as soon as I insert them and try again the analysis gives me error 247. I have read the file d00.log which shows the sentence "not all interface nodes in front".
Can someone help me?