# HADDOCK server: the Easy interface

**URL:** <https://ask.bioexcel.eu/t/haddock-server-the-easy-interface/1958>\
**Category:** Uncategorized\
**Created:** [April 26, 2020, 12:04pm UTC](https://ask.bioexcel.eu/t/haddock-server-the-easy-interface/1958 "2020-04-26T12:04:33Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Mohad20](https://avatars.discourse-cdn.com/v4/letter/m/e95f7d/32.png) [@Mohad20](https://ask.bioexcel.eu/u/Mohad20)\
**Post date:** [April 26, 2020, 12:04pm UTC](https://ask.bioexcel.eu/t/haddock-server-the-easy-interface/1958/1 "2020-04-26T12:04:33Z")

</div>

![Capture](https://europe1.discourse-cdn.com/flex013/uploads/bioexcel/original/1X/a7cd5d39a3cd83bfc69f14736e7be2dc1da20494.png)  
There was an inconsistency in your data Please check that all multiple-choice fields have been filled in. Note that active/passive residues must be provided as comma-separated list of numbers, without residue or chain letters. **Error message** You must supply active and/or passive residues for your first protein.

i try to find the passive residues  
i get this error

Your prediction FAILED

Error message: PDB file contains multiple residues with number 89 in chain A  
If this message is unclear, please contact a.m.j.j.bonvin@uu.nl

Full error message:  
Traceback (most recent call last):  
File “./cportdaemon.py”, line 48, in  
pdb = conversion.validate\_pdb(pdbs[0], form.pdb.chain)  
File “/home/enmr/services/CPORT/cron/conversion.py”, line 55, in validate\_pdb  
raise HaddockValidationError("%s contains multiple residues with number %s in chain %s" % (dataname,resnr.strip(), currchain))  
ValueError: PDB file contains multiple residues with number 89 in chain A

PDB file contains multiple residues with number 89 in chain A

---

<div class="post-metadata">

**Author:** ![amjjbonvin](https://dub1.discourse-cdn.com/flex013/user_avatar/ask.bioexcel.eu/amjjbonvin/32/23_2.png) [@amjjbonvin](https://ask.bioexcel.eu/u/amjjbonvin)\
**Post date:** [April 26, 2020, 12:40pm UTC](https://ask.bioexcel.eu/t/haddock-server-the-easy-interface/1958/2 "2020-04-26T12:40:47Z")

</div>

Nice to use our forum for asking questions. But before doing that, do search the forum to see if your problem has already a solution.

A simple search with "multiple residues” returns several threads containing the solution to your problem.