Hi,   If you haven't tried setting your sort and clustering nodes to use a lot less memory, you should. If I remember correctly, the processing engine will allocate memory for those at the start of your job and it could mean there's not enough memory to either load the Quality Knowledge Base or use the data quality functions. If there are just 50 records in each source, the sort and cluster memory values can be a lot smaller than 512MB. Try starting with 16MB each. Ron ... View more