How to send Parameter in ElFileBody for GraphQL StringBody in Gatling

I am trying to send paramter {NEW_ID} to GraphQL using ElFileBody ,contents of GraphQL are stored in a simple plain text file in Gatling /resources/data folder ,
but i keep getting 500 error …i know i am very close in implementation but can someone guide what is mistake i am making

Here is GraphQL contents which is stored in registerPlayer.txt file under /resources/data folder

`
{
“query”: “mutation registerPlayerByEmail(\n $eventId: ID!,\n $emailAddress: String!) {\n registerPlayerByEmail(eventId: $eventId, emailAddress: $emailAddress) {\n …EventFields\n …PlayerListFields\n __typename\n }\n}\n\nfragment EventFields on Event {\n id\n status\n title\n format\n limitedSet\n rulesEnforcementLevel\n entryFee {\n amount\n currency\n __typename\n }\n venue {\n id\n name\n latitude\n longitude\n address\n timeZone\n phoneNumber\n emailAddress\n __typename\n }\n capacity\n description\n scheduledStartTime\n estimatedEndTime\n latitude\n longitude\n address\n timeZone\n phoneNumber\n emailAddress\n shortCode\n __typename\n}\n\nfragment PlayerListFields on Event {\n registeredPlayers {\n id\n personaId\n displayName\n emailAddress\n firstName\n lastName\n status\n __typename\n }\n interestedPlayers {\n personaId\n displayName\n __typename\n }\n __typename\n}”,
“variables”: {
“eventId”:${NEW_ID},
emailAddress":"automation-player1@abc.com
}
}

`

Here is the code

`

class gamekeeper extends BaseSimulation {

val uri2 = “https://api.platform.abc.com

val headers_0 = Map(
“accept” → “text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3;q=0.9”,
)

val headers_10 = Map(
“accept” → “application/json, text/plain, /”,
)

val headers_3 = Map(
“Content-Type” → “application/json”,

)

val headers_startEvent = Map(
“Content-Type” → “application/json”,
“Authorization” → “Bearer ${ACCESS_TOKEN}”

)

val headers_startNextRound = Map(
“Content-Type” → “application/json”,
“Authorization” → “Bearer ${ACCESS_TOKEN}”

)

val headers_submitResults = Map(
“Content-Type” → “application/json”,
“Authorization” → “Bearer ${ACCESS_TOKEN}”

)

val headers_certifyResults = Map(
“Content-Type” → “application/json”,
“Authorization” → “Bearer ${ACCESS_TOKEN}”

)

val headers_endEvent = Map(
“Content-Type” → “application/json”,
“Authorization” → “Bearer ${ACCESS_TOKEN}”

)

val headers_36 = Map(
“authorization” → “Bearer eyJhbGciOiJSUzI1NiIsImtpZCI6IjM0NmM4YTY1NTBlZGI5MDRjM2IyNWI3ODlmOTllNjU3ODA4MGJiOTUiLCJ0eXAiOiJKV1QifQ.eyJhdWQiOiJXSlJZREhOR1JPSVpITDhCIiwiZXhwIjoxNTgwMjgxMTc1LCJpYXQiOjE1ODAyODAyMTUsImlzcyI6IjRDVTZUQlBDUlpHUk5FV0ZETkE2Q0ZEUDU0Iiwic3ViIjoiTFpPSVBCSzZTNURJVkQyWVJDR0dDT0JGRzQiLCJ3b3RjLW5hbWUiOiJhdXRvbWF0aW9uU3RvcmVBZG1pbjEjODg1NzQiLCJ3b3RjLWRvbW4iOiJ3aXphcmRzIiwid290Yy1nYW1lIjoiZXZlbnRyZXBvcnRlciIsIndvdGMtZmxncyI6OSwid290Yy1yb2xzIjpbXSwid290Yy1wcm1zIjpbXSwid290Yy1zY3BzIjpbImZpcnN0LXBhcnR5Il0sIndvdGMtcGRnciI6IiIsIndvdGMtc2d0cyI6W10sIndvdGMtc29jbCI6e319.Uou737of2lHQTZafsiHDfe0qxgi1lMvnAKEKpSa9Lhm5VSaFtX0ajwlLmj49hA5VuyrCGg-TjhgxTvk_8Kt_LdxTnlntb19tlvUVtlQsNcDsbnP4Ts5XCsyu8fR-TwRx85502-j0qP5ivDg5cP0QKVYroJg8vUSBOu_3eMGaiVTPpdRweJuRQc-rMFAPXwWyhKXNzRV-NfvlL7cEfCiRBLwap5PQ9i0UmbLTk1u6_t-oVgegRf5vjwii7_5icW1J1iemRCVvT5dQzy1qyLavBPXKH9Lee8h0TKswubVoKkWSUnvxavP6EtkSx8Q_5kWvmT3Nba4txhjCuqvIO9HKSw”,
“cache-control” → “no-cache”,
“content-type” → “application/json”,
“origin” → “https://retailer-dev.abc.com”,
“pragma” → “no-cache”,
“referer” → “https://retailer-dev.abc.com/stores/26015/events/825926/pairings”,
“sec-fetch-mode” → “cors”,
“sec-fetch-site” → “same-site”)

val headers_PrivateEvent = Map(
“Content-Type” → “application/json”,
“Authorization” → “Bearer ${ACCESS_TOKEN}”

)

val RegisterPlayer = Map(“Content-Type” → “application/json”,“Authorization” → “Bearer ${ACCESS_TOKEN}” )

val usersDataSource=jsonFile(“C:/Gatling2/gatling3james/src/gatling/resources/data/input-gamekeeper.json”).circular
val nameDataSource=jsonFile(“C:/Gatling2/gatling3james/src/gatling/resources/data/input-gamekeeper-StringBody.json”).random

val source: String = Source.fromFile(“C:/Gatling2/gatling3james/src/gatling/resources/data/input-gamekeeper.json”).getLines.mkString
def userCount: Int = JsonPath.parse(source).read("$.[0].user")
def testDuration: Int = JsonPath.parse(source).read("$.[0].testDuration")
def rampDuration: Int = JsonPath.parse(source).read("$.[0].rampDuration")

before {
println(s"Running test with ${userCount} users")
println(s"Ramping users over ${rampDuration} seconds")
println(s"Total Test duration: ${testDuration} seconds")
}

val createPrivateEvent ={

exec(http(“Create Private Event”)

.post(“https://api.tabletop-stage.abc-origin.cloud/dev/silverbeak-griffin-service/graphql”)
.headers(headers_PrivateEvent)
.body(ElFileBody(“createeventasWER.txt”))

.check(status.in(200,201))
.check(bodyString.saveAs(“PrivateEvent_Response”))

.check(jsonPath(path="$.data.createEvent.id").saveAs(key=“EventId”)))

.exec { session => session.set(“NEW_ID”, session(“EventId”).as[String]) }
.exec{session=>println(session);session}
.pause(1)

}

object RegPlayer {

val RegisterPlayer1 = {

exec(http(“Register Player 1”)

.post(“https://api.tabletop-stage.abc-origin.cloud/dev/silverbeak-griffin-service/graphql”)
.headers(RegisterPlayer)
.body(ElFileBody(“registerPlayer.txt”))

.check(status.in(200, 201))
.check(bodyString.saveAs(“Player1_Response”)))

.exec { session => println(session); session }
.pause(1)

}

}

object gamekeeper{

val startEvent = {

exec(http(“Start Event”)

.post(“https://api.tabletop-stage.abc-origin.cloud/dev/silverbeak-griffin-service/” + “graphql” )

.headers(headers_startEvent)

.body(ElFileBody(“startEvent.txt”))

.check(status.in(200, 201))
.check(bodyString.saveAs(“StartEvent_Response”)))

.exec { session => println(session); session }
.pause(1)

}

val startNextRound = {

exec(http(“Start Next Round”)

.post(“https://api.tabletop-stage.abc-origin.cloud/dev/silverbeak-griffin-service/” + “graphql” )
.headers(headers_startNextRound)

.body(ElFileBody(“createNextRound.txt”))

.check(status.in(200, 201))
.check(jsonPath(path="$.data.createNextRound.currentRound.matches[0].id").saveAs(key=“currentMatchId”))
.check(jsonPath(path="$.data.createNextRound.currentRound.matches[0].teams[1].id").saveAs(key=“rightTeamId”))
.check(jsonPath(path="$.data.createNextRound.currentRound.matches[0].teams[0].id").saveAs(key=“leftTeamId”))
.check(jsonPath(path="$.data.createNextRound.currentRound.matches[1].isBye").saveAs(key=“isBye”))
.check(jsonPath(path="$.data.createNextRound.currentRound.matches[1].leftTeamWins").saveAs(key=“leftTeamWins”))
.check(jsonPath(path="$.data.createNextRound.currentRound.matches[1].rightTeamWins").saveAs(key=“rightTeamWins”))
.check(bodyString.saveAs(“createNextRound”)))

.exec { session => session.set(“currentMatchId”, session(“currentMatchId”).as[String]).set(“leftTeamId”, session(“leftTeamId”).as[String]).set(“rightTeamId”, session(“rightTeamId”).as[String]).set(“isBye”, session(“isBye”).as[String]).set(“leftTeamWins”, session(“leftTeamWins”).as[String]).set(“rightTeamWins”, session(“rightTeamWins”).as[String])set(“matchResults”, matchResults) }
.exec{session=>println(session);session}
.pause(1)

}

val submitResults = {

exec(http(“Submit Results”)

.post(“https://api.tabletop-stage.abc-origin.cloud/dev/silverbeak-griffin-service/” + “graphql” )
.headers(headers_submitResults)

.body(ElFileBody(“submitResults.txt”))

.check(status.in(200, 201))
.check(bodyString.saveAs(“submitResults_Response”)))

.exec { session => println(session); session }
.pause(1)

}

}

val login = exec( exec(http(“PlatForm Auth Url”)

.post(uri2 + “/auth/oauth/token”)
.headers(headers_10)
.formParam(“grant_type”, “password”)
.formParam(“username”, “store-admin1@abc.com”)
.formParam(“password”, “fJC2RuVdvmHB”)
.basicAuth(“WJRYDHNGROIZHL8B”,“V5VXK6FLG1YI0GD2XY3H”)
.check(bodyString.saveAs(“Login_Response”))
.check(jsonPath("$.access_token").exists.saveAs(“access_token”))
.check(jsonPath("$.token_type").exists.saveAs(“token_type”)))
.exec{session=>println(session);session}

.exec { session => session.set(“ACCESS_TOKEN”, session(“access_token”).as[String]).set(“TOKEN_TYPE”, session(“token_type”).as[String]) }

)

val scenario4 = scenario("Full GameKeeper ").exec(login).exec(createPrivateEvent).exec(RegPlayer.RegisterPlayer1)

setUp(

scenario4.inject(
nothingFor(5 seconds),
rampUsers(userCount) over ( rampDuration ))
.protocols(httpProtocol)

)

.maxDuration(testDuration)
}
`

Here is the console log:-

`

“C:\Program Files\Java\jdk1.8.0_191\bin\java.exe” “-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.5\lib\idea_rt.jar=10303:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2018.2.5\bin” -Dfile.encoding=UTF-8 -classpath “C:\Program Files\Java\jdk1.8.0_191\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_191\jre\lib\rt.jar;C:\Gatling2\gatling3james\out\gatling\classes;C:\Gatling2\gatling3james\out\gatling\resources;C:\Users\dast.gradle\caches\modules-2\files-2.1\com.jayway.jsonpath\json-path\2.4.0\765a4401ceb2dc8d40553c2075eb80a8fa35c2ae\json-path-2.4.0.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling.highcharts\gatling-charts-highcharts\2.3.1\5ba08aef35db721c70cd74d0d1847e29264463d3\gatling-charts-highcharts-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-app\2.3.1\de2900b1b6cff8e441ad879a0122f3c5cf72b819\gatling-app-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-charts\2.3.1\5afc7b7c7ae51bb403257c5b7d9cf5fb2b740039\gatling-charts-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-recorder\2.3.1\5c52da235e1079727bbcc344744fd6d0705a78bb\gatling-recorder-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-http\2.3.1\82fb51cba4a82d4c8fb3aa66510592eaa1188b8e\gatling-http-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-jms\2.3.1\9cb35051ebbc6460b3203cce610ad250962fb88\gatling-jms-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-jdbc\2.3.1\b5ca167eef50c93442a4315064b067f6fadbd62c\gatling-jdbc-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-redis\2.3.1\dbe97918f9e4bf259ef2deda624c2143572fccc7\gatling-redis-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-metrics\2.3.1\d1dfe867e9d3fa8471d8ea1feb6542e10fecbffd\gatling-metrics-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-core\2.3.1\84a413fee33fe24c13993633436d2dbc119a584b\gatling-core-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.scala-lang.modules\scala-swing_2.12\2.0.0\9fab4819bd06ba64df76d15930913a9a84c3b50f\scala-swing_2.12-2.0.0.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\gatling-commons\2.3.1\f0bf9b23929d9cd2de228de0b533c15ddf28df45\gatling-commons-2.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\com.typesafe.akka\akka-slf4j_2.12\2.5.4\b5d88662d8e71aa0a8978c5f68533495c2c96296\akka-slf4j_2.12-2.5.4.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.suzaku\boopickle_2.12\1.2.6\85281da7833655a0fb7c91274c7a97cbe61b990c\boopickle_2.12-1.2.6.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\net.debasishg\redisclient_2.12\3.4\2539f8fb8911ecb6788d00d1a64ebca10faf47ef\redisclient_2.12-3.4.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\com.typesafe.akka\akka-actor_2.12\2.5.4\437cfe40519a36b8c4890cb6b2ef3800d0549812\akka-actor_2.12-2.5.4.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.scala-lang.modules\scala-java8-compat_2.12\0.8.0\1e6f1e745bf6d3c34d1e2ab150653306069aaf34\scala-java8-compat_2.12-0.8.0.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\com.github.scopt\scopt_2.12\3.7.0\e078455e1a65597146f8608dab3247bf1eb92e6e\scopt_2.12-3.7.0.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\io.gatling\jsonpath_2.12\0.6.9\a95b4587535e269fc5c95dea247c33e4c803d152\jsonpath_2.12-0.6.9.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.scala-lang.modules\scala-xml_2.12\1.0.6\e22de3366a698a9f744106fb6dda4335838cf6a7\scala-xml_2.12-1.0.6.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\com.dongxiguo\fastring_2.12\0.3.1\17f2d89723f1be0adec828aac747e4f4645499c7\fastring_2.12-0.3.1.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\com.softwaremill.quicklens\quicklens_2.12\1.4.8\68e8e450ed5ba00f8997b70f63cb80c767747302\quicklens_2.12-1.4.8.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\com.typesafe.scala-logging\scala-logging_2.12\3.7.2\a1dc97509765287faa4747f7cb411f0b85dc9a34\scala-logging_2.12-3.7.2.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.scala-lang.modules\scala-parser-combinators_2.12\1.0.6\2785fb31169d9a89298eb05f748d90205bc2592e\scala-parser-combinators_2.12-1.0.6.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.scala-lang\scala-reflect\2.12.3\a017f8f606e5f433df4f8d5efc20ce39c2fe8330\scala-reflect-2.12.3.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.scala-lang\scala-library\2.12.3\f2e496f21af2d80b48e0a61773f84c3a76a0d06f\scala-library-2.12.3.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\net.minidev\json-smart\2.3\7396407491352ce4fa30de92efb158adb76b5b\json-smart-2.3.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.asynchttpclient\async-http-client\2.0.39\23526d492a5c7483a6cf31ca9393a7475576bcc2\async-http-client-2.0.39.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.asynchttpclient\async-http-client-netty-utils\2.0.39\17dd8dd8f226000db4a458cb8017b5987c9fb4d\async-http-client-netty-utils-2.0.39.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\ch.qos.logback\logback-classic\1.2.3\7c4f3c474fb2c041d8028740440937705ebb473a\logback-classic-1.2.3.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\org.asynchttpclient\netty-resolver-dns\2.0.39\9a31480288a2286058c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ool\commons-pool\1.6\4572d589699f09d866a226a14b7f4323c6d8f040\commons-pool-1.6.jar;C:\Users\dast.gradle\caches\modules-2\files-2.1\ch.qos.logback\logback-core\1.2.3\864344400c3d4d92dfeb0a305dc87d953677c03c\logback-core-1.2.3.jar;C:\Users\dast.ivy2\cache\org.scala-lang\scala-library\jars\scala-library-2.12.7.jar;C:\Users\dast.ivy2\cache\org.scala-lang\scala-reflect\jars\scala-reflect-2.12.7.jar;C:\Users\dast.ivy2\cache\org.scala-lang\scala-library\srcs\scala-library-2.12.7-sources.jar;C:\Users\dast.ivy2\cache\org.scala-lang\scala-reflect\srcs\scala-reflect-2.12.7-sources.jar” GatlingRunner
17:16:08,619 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml]
17:16:08,619 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy]
17:16:08,619 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/C:/Gatling2/gatling3james/out/gatling/resources/logback.xml]
17:16:08,713 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
17:16:08,714 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender]
17:16:08,723 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [CONSOLE]
17:16:08,729 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property
17:16:08,736 |-WARN in ch.qos.logback.classic.encoder.PatternLayoutEncoder@78ac1102 - As of version 1.2.0 “immediateFlush” property should be set within the enclosing Appender.
17:16:08,736 |-WARN in ch.qos.logback.classic.encoder.PatternLayoutEncoder@78ac1102 - Please move “immediateFlush” property into the enclosing appender.
17:16:08,815 |-WARN in ch.qos.logback.classic.encoder.PatternLayoutEncoder@78ac1102 - Setting the “immediateFlush” property of the enclosing appender to false
17:16:08,816 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to WARN
17:16:08,816 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [CONSOLE] to Logger[ROOT]
17:16:08,816 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration.
17:16:08,818 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@2de8284b - Registering current configuration as safe fallback point

Running test with 1 users
Ramping users over 2 seconds
Total Test duration: 180 seconds
Simulation simulations.gamekeeper started…

Hey Stephane, i think it will be a great help if you can let me know how to generate a CURL request for the above request sent from Gatling…if i know what request is sent by Gatling to server then it will be easy to debug???

Nevermind i got that https://gatling.io/docs/current/general/debugging