Error using netlogo-headless in NetLogo 7.0+

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Leo Niehorster-Cook

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Mar 24, 2026, 5:31:52 PM (2 days ago) Mar 24
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Hi fellow NetLogo addicts,
I've been using NetLogo on a high-performance computing cluster and have been unable to use the new NetLogo 7.0+ with my current setup. Specifically using netlogo-headless.sh it fails with:
ClassNotFoundException: []

It seems like the headless script uses ABSOLUTE_CLASSPATH pointing to a single jar: lib/app/netlogo-7.0.3.jar
Consulting an LLM during debugging, it said that "NetLogo 7 requires all jars in lib/app/" - unsure if this is accurate but if so could result in an empty / invalid classpath passed to Java. 

Please let me know if I'm doing something wrong or if anyone else has been able to run NetLogo 7 in headless mode.
Cheers,
Leo

Isaac Brown

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Mar 25, 2026, 12:46:23 PM (17 hours ago) Mar 25
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Hi Leo,

Thank you for the bug report. Fortunately, this issue has already been resolved, and will be fixed in the upcoming release of NetLogo!

Isaac B.

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