Thank you very much for the response. I have ran atomicityTest curl command on all 1-16 tiles and looks like it is failing on Tiles 10,11,12,14,15,16. Surprisingly Tiles 9 and 13 Passed. I am not sure what might be broken, I have edited /home/db2inst1/sqllib/db2nodes.cfg file in dbserver9 and 13 and assigned the respective tile number. What might be wrong?