In my recent project I have used FAST Search to crawl Oracle content source using BCS. We are getting error Error while crawling LOB contents. ( ILobSystem could not be found using criteria 'Id=xxxxx'. ) if we import BCS connector with updation after delete previous one and start crawl again. This is because of we have already indexed data in our indexer server and crawler is again trying to crawl the existing data that was not found. So we wrote a PowerShell script to delete/clear all indexed data for a particular content source. Copy the below PowerShell commands and create a .ps1 file, you have to modify only content source name and FAST Content SSA name. $sourceName = "Your content Source Name" $contentSSA = " Your FAST Content SSA Name" $source = Get-SPEnterpriseSearchCrawlContentSource -Identity $sourceName -SearchApplication $contentSSA $startaddresses = $source.StartAddresses | ForEach-Object { $_.OriginalString } $source...