# Error in running HADDOCK **URL:** \ **Category:** HADDOCK\ **Created:** [September 21, 2017, 4:04pm UTC](https://ask.bioexcel.eu/t/error-in-running-haddock/499 "2017-09-21T16:04:33Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Arjun\_Ray](https://avatars.discourse-cdn.com/v4/letter/a/f04885/32.png) [@Arjun\_Ray](https://ask.bioexcel.eu/u/Arjun_Ray)\ **Post date:** [September 21, 2017, 4:04pm UTC](https://ask.bioexcel.eu/t/error-in-running-haddock/499/1 "2017-09-21T16:04:33Z")
Hi there, I am getting the following error while trying to do protein-protein docking: * * * There was an inconsistency in your data Error message Instances of ligand 604 do not contain the same atoms Directory of the run: [http://milou.science.uu.nl/serviceresults/HADDOCK2.2/1981334668/run1](http://milou.science.uu.nl/serviceresults/HADDOCK2.2/1981334668/run1) * * * Since only one of the protein contained the residue #604, I checked and it seemed fine. So could someone kindly point me to the error reason? Thanks Arjun ---
**Author:** ![mtrellet](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/mtrellet/32/42_2.png) [@mtrellet](https://ask.bioexcel.eu/u/mtrellet)\ **Post date:** [September 21, 2017, 4:20pm UTC](https://ask.bioexcel.eu/t/error-in-running-haddock/499/2 "2017-09-21T16:20:27Z")
Hello Arjun, Looking at your 1st PDB file, it appears that you have 2 ligands named “604” with residue IDs 1 and 2. And these two ligands have different atoms since the 1st ligand lacks atoms C1, C2 and C3. I hope this will help you, Cordially, Mikael ---
**Author:** ![Arjun\_Ray](https://avatars.discourse-cdn.com/v4/letter/a/f04885/32.png) [@Arjun\_Ray](https://ask.bioexcel.eu/u/Arjun_Ray)\ **Post date:** [September 21, 2017, 4:33pm UTC](https://ask.bioexcel.eu/t/error-in-running-haddock/499/3 "2017-09-21T16:33:47Z")
Dear Mikael, Thank you so much! I have deleted the ligand and now it works! Sorry for my stupidity. Cheers Arjun