Fix multiple occupancies or insertions

Hello, I keep getting this error:
The following error occurred when processing one of your PDB file: Resnum field should contain only numbers but " 104A" was found.
How can I fix it with PDB tools?
Thanks.

This is a case of insertion numbering, typical for antibodies.

You can use PDB-Tools from “deinserting” those residues (note that it will change the numbering of your PDB file).

Use the pdb_fixinsert command for this.

[

PDB-Tools - Pdbtools_bp.manual
science.uu.nl

pipeline_loadsave.png

](https://rascar.science.uu.nl/pdbtools/manual#pdb_fixinsert)

And if working with antibodies to check the relevant tutorials on Education & Tutorials of the Bonvin Lab – Bonvin Lab

Thank you!