Hi Lakshmi,
Try below two things:
1. Check the company code entries in the recon key and if entries maintained in FPG0 is for all company codes applicable.
2. You are trying to use alternate posting date as 30.06.2013. Check if the posting period for June is closed. When did you try first to send FI/CA to G/L? If on 1st of July, there is a high possibility that June period is now closed.
Regards,
Ravi