<this may turn out to be expencive (try it out) but it will give
<you result with date in first field, numbers of 'OB' and 'CB' for
<that date in second and third field for all dates that have numbers
<of 'OB's and 'CB's unequal - meaning there are orphans.

<Vladimir Vlaisavljevic


Thanks

You are right - it was very expensive.

Riho-Rene Ellermaa
senior programmer