# Modularising /chaining scenarios **URL:** \ **Category:** Gatling (Open-Source)\ **Created:** [September 23, 2019, 11:34am UTC](https://community.gatling.io/t/modularising-chaining-scenarios/5253 "2019-09-23T11:34:12Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Shazad\_Dad](https://avatars.discourse-cdn.com/v4/letter/s/ecd19e/32.png) [@Shazad\_Dad](https://community.gatling.io/u/Shazad_Dad)\ **Post date:** [September 23, 2019, 11:34am UTC](https://community.gatling.io/t/modularising-chaining-scenarios/5253/1 "2019-09-23T11:34:12Z")
Hi I have tried to implement a process running scenarios in sequence using the method described in :[https://stackoverflow.com/questions/15568284/modularising-scenarios-to-run-in-sequence-using-gatling](https://stackoverflow.com/questions/15568284/modularising-scenarios-to-run-in-sequence-using-gatling) We have a number of scenarios that will be running in parallel, but there are a few that will need to be run in sequence, i.e scn1, then scn2 then scn3 ive tried this package CommPayPerfTest import CommPayPerfTest.Configuration.\_ import CommPayPerfTest.Components.Common.\_ import CommPayPerfTest.Scenarios.\_ import CommPayPerfTest.Scenarios.CommPay.PerfTestApi.\_ import io.gatling.core.structure.{ChainBuilder, ScenarioBuilder} import io.gatling.core.Predef.\_ import io.gatling.http.Predef.\_ import scala.concurrent.duration.\_ // Use this for developing a scenario in isolation class StatementSimulation extends Simulation { val httpProtocol = Config.getHttpProtocol(http) val statementRecords = exec(StatementRecord) val statementImport = exec(StatementImport) val modular = Seq (statementRecords,statementImport) val scn1 = scenario (“Scenario 1”).exec(modular) setUp( scn1.getScenario() .inject(atOnceUsers(1)) [//scn1.getScenario](https://scn1.getScenario)() // .inject(atOnceUsers(1)) ) .protocols(httpProtocol) } but it fails with this error: 12:13:14.968 [ERROR] i.g.c.ZincCompiler$ - C:\Gatling\Commpay-PerformanceTesting\user-files\simulations\CommPayPerfTest\Scenarios\CommPay\PerfTestApi\StatementScenarios.scala:20:28: overloaded method value exec with alternatives: (scenario: io.gatling.core.structure.ScenarioBuilder)io.gatling.core.structure.ChainBuilder (chains: Iterable[io.gatling.core.structure.ChainBuilder])io.gatling.core.structure.ChainBuilder (chains: Iterator[io.gatling.core.structure.ChainBuilder])io.gatling.core.structure.ChainBuilder (chains: io.gatling.core.structure.ChainBuilder\*)io.gatling.core.structure.ChainBuilder (actionBuilder: io.gatling.core.action.builder.ActionBuilder)io.gatling.core.structure.ChainBuilder (sessionFunction: io.gatling.core.session.Expression[io.gatling.core.session.Session])io.gatling.core.structure.ChainBuilder cannot be applied to (CommPayPerfTest.Scenarios.CommPay.PerfTestApi.StatementRecord.type) val statementRecords = exec(StatementRecord) any ideas i thought this would be straightforward…) ^ [![iress.com](https://www.iress.com/media/images/iress-logo-email-signature.original.png "iress.com")](https://www.iress.com/) Shazad Dad​ Senior Tester Tel: +441926621417 [**shazad.dad@iress.com**](mailto:shazad.dad@iress.com) [**www.iress.com**](https://www.iress.com/) 1 Kingmaker Court, Warwick Technology Park, Gallows Hill, Warwick, Warwickshire, CV34 6DY The contents of this email originated from Iress. For this purpose Iress includes Iress Limited and/or any of its subsidiaries, holding companies and trading entities. ​If you have received this email in error please notify the sender immediately and delete this email. nosig ---
**Author:** ![notdryft](https://dub1.discourse-cdn.com/flex013/user_avatar/community.gatling.io/notdryft/32/1103_2.png) [@notdryft](https://community.gatling.io/u/notdryft)\ **Post date:** [September 23, 2019, 11:53am UTC](https://community.gatling.io/t/modularising-chaining-scenarios/5253/2 "2019-09-23T11:53:24Z")
Hi, It says “cannot be applied to (CommPayPerfTest.Scenarios.CommPay.PerfTestApi.StatementRecord.type)”. Hence, I suspect StatementRecord and StatementImport are actually objects while they should be vals of defs with a chain inside. ---
**Author:** ![Shazad\_Dad](https://avatars.discourse-cdn.com/v4/letter/s/ecd19e/32.png) [@Shazad\_Dad](https://community.gatling.io/u/Shazad_Dad)\ **Post date:** [September 23, 2019, 12:49pm UTC](https://community.gatling.io/t/modularising-chaining-scenarios/5253/3 "2019-09-23T12:49:10Z")
thank you for your response, i changed the simulation so it calls the object and then then defs like val statementRecords = exec(StatementRecord.createStatementRecord) val statementImport = exec(StatementImport.importStatements) val modular = Seq (statementRecords,statementImport) val scn1 = scenario (“Scenario 1”).exec(modular) setUp( scn1.inject( atOnceUsers(1)) [//scn1.getScenario](https://scn1.getScenario)() // .inject(atOnceUsers(1)) ) .protocols(httpProtocol) it compiles which is better news, but it only runs the second scenario ‘Statement Import’ - not the first one statementrecords.? ![](https://www.iress.com/media/images/iress-logo-email-signature.original.png) Shazad Dad​ Senior Tester Tel: +441926621417 The contents of this email originated from Iress. For this purpose Iress includes Iress Limited and/or any of its subsidiaries, holding companies and trading entities. ​​If you have received this email in error please notify the sender immediately and delete this email. ---
**Author:** ![Shazad\_Dad](https://avatars.discourse-cdn.com/v4/letter/s/ecd19e/32.png) [@Shazad\_Dad](https://community.gatling.io/u/Shazad_Dad)\ **Post date:** [September 23, 2019, 1:44pm UTC](https://community.gatling.io/t/modularising-chaining-scenarios/5253/4 "2019-09-23T13:44:44Z")
Thats now working thanks ![](https://www.iress.com/media/images/iress-logo-email-signature.original.png) Shazad Dad​ Senior Tester Tel: +441926621417 The contents of this email originated from Iress. For this purpose Iress includes Iress Limited and/or any of its subsidiaries, holding companies and trading entities. ​​If you have received this email in error please notify the sender immediately and delete this email. ---
**Author:** ![Shazad\_Dad](https://avatars.discourse-cdn.com/v4/letter/s/ecd19e/32.png) [@Shazad\_Dad](https://community.gatling.io/u/Shazad_Dad)\ **Post date:** [September 23, 2019, 2:46pm UTC](https://community.gatling.io/t/modularising-chaining-scenarios/5253/5 "2019-09-23T14:46:42Z")
just an additional question related to this, when creating a sequence of scenarios can i still use the individual scenario set in the simulation or would it need to use a single generic feeder file? ![](https://www.iress.com/media/images/iress-logo-email-signature.original.png) Shazad Dad​ Senior Tester Tel: +441926621417 The contents of this email originated from Iress. For this purpose Iress includes Iress Limited and/or any of its subsidiaries, holding companies and trading entities. ​​If you have received this email in error please notify the sender immediately and delete this email.