ME_MAINTAIN_INFORECORD - Price update issue

All, We are using FM 'ME_MAINTAIN_INFORECORD' to update PIR with prices accordingly. Off late we have noticed a strange behavior where the file price not updated in condition record only for first record of the file. I looked at the custom program thoroughly and don't see any issue. If the first record is update twice, then we are able to see the price in the condition record. Has any one encountered similar issue? Is there any global variable to be intialized or assigned etc ? Any pointer in solving this issue?