extension dll exception when filtering out synced users

hello everyone,

I have these 2 active directory connector syncing users from one domain to another,

I now have to filter some users out of the sync process so I added a filter on the source connector, and as soon as I add this filter I get an extension dll exception for all users that meet the filtering criteria :

System.Exception: Attribute "st" is not present.
   at Mms_Metaverse.MVExtensionObject.Microsoft.MetadirectoryServices.IMVSynchronization.Provision(MVEntry mventry) in C:\Fim source code\mvextension\MVExtension\MVExtension.cs:line 142

this attribute is present for the user and zhen I re;ove the filter the sync zorks fine,

also if I preview the user account I see that it has an attribute recall and repopulation thing it's trying to do... no idea why !

anyone can help ?

thanks ! 

Hitch Bardawil