have you entered Target Spl Gl indicator in F-47 transaction? (as per SAP standard target spl ind will be A)
And check in OAYR for special GL indicator F config, there check box noted item should be selected----
Check which date, you have entered during F-47 for field due on-----
This Due on date should be ealier then the posting date used in F-48----
Have you maintained alteranative recon accounts in OAYR?
Please check the above and get back to me for any clarifications.