Question on Analysis Center and AM_LegendMissExpr table.

Greetings All,
I have an issue with Analysis Center where we have data being dumped into the AM_LegendMissExpr table and not making it to the reports. I have re-run the "Create Data Source Data Marts" for the data source and that has fixed some but not all and some are critical metrics. Is there anyway to get these data streams reprocessed and into the reports? Many thanks in advance for any help.