[BUG] Macsyfinder crashes when writing results for a model with multi_system

[ldorison]

Describe the bug
Macsyfinder crashes when writing results for a model where all mandatory genes have multi_system= "true". It does it with any hmm profile and crashes even if there is only one gene in the model. If one or more of the mandatory genes don't have the multi_system option, then Macsyfinder runs correctly.

I've attached a profile definition I tested, to adapt with any hmm profile and the log file of one of the runs.

To Reproduce
Steps to reproduce the behavior:

1. The exact command lines you use 'macsyfinder --sequence-db complete_genomes.faa -m AGM aglQRS --db-type gembase --coverage-profile 0.5 --no-cut-ga -o test -w 0'

2. See error
   Expected behavior

A clear and concise description of what you expected to happen.

Screenshots
exemple of a model that crashes:

error message:

Please complete the following information):

OS:

• Mac

MacSyFinder Version:
MacSyFinder 2.1.6
using:

• Python 3.14.2 | packaged by conda-forge | (main, Dec 6 2025, 11:34:40) [Clang 20.1.8 ]
• MacSyLib 1.0.4
• NetworkX 3.6.1
• Pandas 3.0.0

Additional context
files attached:

macsyfinder.log

aglQRS.xml