One of your items is missing a record in timCostTier (likely).  Without good SQL knowledge this will be hard to fix.  If you can figure out which item it is you might be able to do a cost tier adjustment to create a timCostTier record (might depend on your costing method).  I would probably contact your reseller or Sage support.  If you feel good about SQL then the first step would be to run a trace on the trigger object and back track it from there.  Good luck.

Thanks for the reply.  We did end up figuring out tracing back through the trigger.

Thanks for the reply.  We did end up figuring out tracing back through the trigger.