# Error running build\_seq.py
**URL:** https://ask.bioexcel.eu/t/error-running-build-seq-py/4450
**Category:** HADDOCK
**Created:** [August 15, 2023, 3:35pm UTC](https://ask.bioexcel.eu/t/error-running-build-seq-py/4450 "2023-08-15T15:35:59Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@michael](https://ask.bioexcel.eu/u/michael)
#### Post date: [August 15, 2023, 3:35pm UTC](https://ask.bioexcel.eu/t/error-running-build-seq-py/4450/1 "2023-08-15T15:35:59Z")
Hi
I am not sure this is the right place to ask, if not please let me know who I can ask.
I am trying to run a script that is used in HADDOCK papers (Information-Driven, Ensemble Flexible Peptide Docking Using HADDOCK) called “build\_seq.py” in pymol and I am encountering the following error:
PyMOL\>run build\_seq.py
PyMOL\>build\_seq peptide, QGAADLESLGQ, phi=-60, psi=-40
Building sequence: QGAADLESLGQ
Error: Selection 0: Invalid selection name “\_tmp\_editor”.
( \_tmp\_editor and name N )\<–
and only the first 4 amino acids are built.
I changed the code to work with Python 3 since I have a newer version of Pymol (changed the print and except syntax)
I’ll really appreciate your help.
Best,
Miriam
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### Author:  [@amjjbonvin](https://ask.bioexcel.eu/u/amjjbonvin)
#### Post date: [August 22, 2023, 12:27pm UTC](https://ask.bioexcel.eu/t/error-running-build-seq-py/4450/2 "2023-08-22T12:27:13Z")
It is a python version problem I am afraid…
Last time we used it on the nmrbox VMs and it worked fine.
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### Author:  [@marco.giulini](https://ask.bioexcel.eu/u/marco.giulini)
#### Post date: [August 22, 2023, 5:39pm UTC](https://ask.bioexcel.eu/t/error-running-build-seq-py/4450/3 "2023-08-22T17:39:24Z")
hi,
I tried to convert the script to a python3-compatible version, it is working on my machine (pymol 2.5.5, macbook air M1), check it out [build\_seq\_3.py.txt](https://ask.bioexcel.eu/uploads/short-url/uHjUGnFUYQGjgLBgH5KnD8xmJJv.txt) (6.8 KB) and let me know if it works!
you’ll have to rename it to build\_seq\_3.py first
Best,
Marco
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### Author:  [@michael](https://ask.bioexcel.eu/u/michael)
#### Post date: [August 24, 2023, 5:18pm UTC](https://ask.bioexcel.eu/t/error-running-build-seq-py/4450/4 "2023-08-24T17:18:30Z")
Thank you!
Unfortunately, it does not work on my laptop (Windows) Pymol version 2.5.5. It builds only part of the peptide.
