Hello Dhivya,
A quick search on the support portal, just by entering the error message number will give you 14 notes, 2 SDN discussions, 1 wiki.
Look at this one :
28958 - Link to follow-on documents is lost
Also, check what was the value of the GR, check if the invoice should be valuated, there might some process in place whereby the invoice is not valuated (so no financialmaterial documents)...
Alexandre
**edited**