Patient came with severe pain in 26. H/o RCT done 1 month back. Re RCT was planned as, 1) palatal canal was obturated beyond the apex 2) disto buccal canal was under obturated 3) mesio buccal 2 was missed H files and GP solve was used to remove old GP...canals were cleaned and well irrigated. Ca(Oh)2 dressing given for a week. Obturation done later and GIC interim restoration given. Patient is asymptomatic and very satisfied.