# Duplicate Scenario Name error message
**URL:** https://community.gatling.io/t/duplicate-scenario-name-error-message/1927
**Category:** Gatling (Open-Source)
**Created:** [January 23, 2015, 4:40pm UTC](https://community.gatling.io/t/duplicate-scenario-name-error-message/1927 "2015-01-23T16:40:57Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@jarrowwx](https://community.gatling.io/u/jarrowwx)
#### Post date: [January 23, 2015, 4:40pm UTC](https://community.gatling.io/t/duplicate-scenario-name-error-message/1927/1 "2015-01-23T16:40:57Z")
Enhancement Request: Add the duplicate name to the error message.
The message looks like this:
Exception in thread “main” java.lang.IllegalArgumentException: Scenario names must be unique but found a duplicate
It would be very helpful if it said which name was duplicated. I’ve got 20+ in one simulation, and it would be nice to know what I’m looking for. 🙂
---
### Author:  [@Pierre\_DAL-PRA](https://community.gatling.io/u/Pierre_DAL-PRA)
#### Post date: [January 23, 2015, 4:48pm UTC](https://community.gatling.io/t/duplicate-scenario-name-error-message/1927/2 "2015-01-23T16:48:03Z")
Hi John !
Indeed, knowing which scenario names are duplicated would be nice.
As always, contributions are welcomed 🙂
Little hint : [https://github.com/gatling/gatling/blob/master/gatling-core/src/main/scala/io/gatling/core/scenario/Simulation.scala#L101](https://github.com/gatling/gatling/blob/master/gatling-core/src/main/scala/io/gatling/core/scenario/Simulation.scala#L101) 😉
Cheers,
Pierre
---
### Author:  [@slandelle](https://community.gatling.io/u/slandelle)
#### Post date: [January 26, 2015, 10:52am UTC](https://community.gatling.io/t/duplicate-scenario-name-error-message/1927/3 "2015-01-26T10:52:05Z")
Done: [https://github.com/gatling/gatling/issues/2531](https://github.com/gatling/gatling/issues/2531)
---
### Author:  [@John\_Arrowwood1](https://community.gatling.io/u/John_Arrowwood1)
#### Post date: [January 26, 2015, 5:25pm UTC](https://community.gatling.io/t/duplicate-scenario-name-error-message/1927/4 "2015-01-26T17:25:55Z")
What’s really odd is, there wasn’t really a duplicate. I could not figure it out, and yet eventually the problem went away. Go figure!
---
### Author:  [@slandelle](https://community.gatling.io/u/slandelle)
#### Post date: [January 26, 2015, 5:45pm UTC](https://community.gatling.io/t/duplicate-scenario-name-error-message/1927/5 "2015-01-26T17:45:19Z")
Maybe some Zinc incremental compilation issue.
---
### Author:  [@jarrowwx](https://community.gatling.io/u/jarrowwx)
#### Post date: [January 26, 2015, 6:35pm UTC](https://community.gatling.io/t/duplicate-scenario-name-error-message/1927/6 "2015-01-26T18:35:11Z")
Hmm. That would be very bad. How could I rule that out?
---
### Author:  [@slandelle](https://community.gatling.io/u/slandelle)
#### Post date: [January 26, 2015, 6:44pm UTC](https://community.gatling.io/t/duplicate-scenario-name-error-message/1927/7 "2015-01-26T18:44:19Z")
That’s just purely hypothetical. Zinc uses sbt’s incremental compiler, so it’s quite safe…
If you have a doubt, you can clean the target directory to trigger a full compilation.