IT1018 - Message no. RP718 "A segment could not be derived"

Question

History: We have the requirement that the Employer's portion of selected payroll taxes be expensed according to the account assignment of the secondary postion or the supplemental pay instead of the assignment of the primary position.  Our consultant determined that posting payroll to accounting using the option "Distribution of Liabilities According to Expenses" was the solution.  Note: New GL was part of our original implementation of FI.
Problem:  Having implemented this option, when we update infotypes 0001 and 1018 on a position we get a warning message "A segment could not be derived" (Message RP718).  We don't use the "Segment" field as we are a single-purpose government and FAS131 does not apply.  Furthermore, Segments appear to be derived from Profit Centers which is also something we don't use.
Question:  How do we turn off this warning or otherwise disable the Segment field?
Thanks.
Edited by: Thomas Campbell on Mar 10, 2010 2:56 PM

Answer 1

The reason for error message PB096 ("Change too far in past for position  holder") is the following:
you are trying to change a costcenter assignment with a begin date of 07/02/2001. This date is lower than the personal Earliest retractive accounting date of infotype 0003 (-> stored in field PRDAT 06/23/2008).
If you want to change the costcenter assignment you need to choose a suitable period (BEGDA>PRDAT) to do the change. Then it should be possible to change the costcenter assignment without any error or warning message.