IS-OIL Transaction O4_Tiger / Tank G/L analysis

[Mattsava]

In Transaction O4_Tiger / Tank G/L analysis we are getting a problem with the last couple of tank dips. upto 18.12.2015 all ok after this date all tank dips entered have "0" in the Turnover% column and "ZERO" rather than "TTO" in the % T/O Based on column. This issue is affecting one tank all other tanks are working ok. Does anyone have any idea what is causing this, I presume that there is something missing in the user process to enter the tank dip but I can not see what it is. I have deleted the dip entries and re entered them but I get the same result.

[Mattsava]

Anyone any ideas on this one, I have users with this again. Just need to find some documentation defining what ZERO, TTO and OSB mean in the %T/O Based on column of transaction 04_Tiger.