# Error 305 on tutorial pw.x simulation

**URL:** <https://aiida.discourse.group/t/error-305-on-tutorial-pw-x-simulation/620>\
**Category:** New to AiiDA\
**Tags:** question\
**Created:** [June 9, 2025, 9:10am UTC](https://aiida.discourse.group/t/error-305-on-tutorial-pw-x-simulation/620 "2025-06-09T09:10:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![DoctorMushy](https://avatars.discourse-cdn.com/v4/letter/d/a6a055/32.png) [@DoctorMushy](https://aiida.discourse.group/u/DoctorMushy)\
**Post date:** [June 9, 2025, 9:10am UTC](https://aiida.discourse.group/t/error-305-on-tutorial-pw-x-simulation/620/1 "2025-06-09T09:10:58Z")

</div>

Hi all,

I’m trying my first QE calculation within Quantum Mobile. I’ve been following [Running external codes — AiiDA Tutorials](https://aiida-tutorials.readthedocs.io/en/latest/sections/running_processes/basics.html) and after a few attempts cannot get a successful simulation. I believe this is a result of 'an error ‘\_aiidasubmit.sh: line 6: mpirun: command not found’. The output files are completely empty, so I imagine I’ve messed up some configuration. Please let me know if there’s anything else required to troubleshoot.