PS 9.0 - COMBO_CF_EDIT_REQUEST Handler deos not provide error messages for each line. Only marks val

We have issue with implementing COMBO_CF_EDIT_REQUEST to validate 3rd party requests (accounting entries) because the combo edit method does not provide detail error message for each line. It only marks the line as in error or not and then marks the header record as error if one or more lines are in error. But no detail message. However, in PS 9.1 and Tools 8.52 we get detailed message. Did anybody come across with this issue and how it has been resolved in PS 9.0.