Incorrect Data - Inconsistencies between ICHIST table and OESHID table

[gbinnz]

I have an issue with data fromthe OESHID table not being correctly reflected in the ICHIST table, some shipments are showing as positive amounts rather than negative in the ICHIST table and the quantity is also incorrect. There seems to be no rhyme or reason to the errors i.e. no correlating factor(s) doesn't happen to all transaction, isn't part number specific, or customer specific can happen for a number of day's in a row and then not happen again for a fortnight .... there is plenty of disk space on the server, we are running version 5.2 of Accpac on a Pervasive SQL database .... Any idea's