# Implicit conversion error
**URL:** https://community.gatling.io/t/implicit-conversion-error/8778
**Category:** Gatling (Open-Source)
**Created:** [March 4, 2024, 9:49am UTC](https://community.gatling.io/t/implicit-conversion-error/8778 "2024-03-04T09:49:31Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@balaji](https://community.gatling.io/u/balaji)
#### Post date: [March 4, 2024, 9:49am UTC](https://community.gatling.io/t/implicit-conversion-error/8778/1 "2024-03-04T09:49:31Z")
I am seeing this error
Found: (“${pkgId}” : String)
Required: io.gatling.core.session.Expression[Any]
Note that implicit conversions cannot be applied because they are ambiguous;
both getter stringIsNeitherValidableNorString1 in object NeitherValidableNorString and getter stringIsNeitherValidableNorString2 in object NeitherValidableNorString match type io.gatling.core.NeitherValidableNorString.DoesNotContain[String]
from this code. Pls help
```scala
import io.gatling.core.Predef._
import io.gatling.http.Predef._
import scala.concurrent.duration._
import scala.language.postfixOps
import io.gatling.core.session.Expression
class CombinedSimulation extends Simulation {
object Configuration
{
val description: Expression[String] = "bulk05-*"
val printOrder: Expression[String] = "orderJobNum"
val printQueue: Expression[String]= "237"
}
// Common HTTP Configuration
val httpConf = http.baseUrl("https://x.cloud").shareConnections
// Common headers
val commonHeaders = Map(
"accept" -> "text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7",
"origin" -> "https://x.cloud",
"pragma" -> "no-cache",
"sec-ch-ua" -> """Chromium";v="122", "Not(A:Brand";v="24", "Google Chrome";v="122""",
"sec-ch-ua-mobile" -> "?0",
"sec-ch-ua-platform" -> "Windows",
"upgrade-insecure-requests" -> "1"
)
// Simulation 1 - ImportVisitManager
val csvFileWriter = new java.io.PrintWriter(new java.io.File("user_requests.csv"))
csvFileWriter.println("PkgId")
val xmlTemplate =
"""
--
"""
val dataFeeder = Iterator.continually(Map(
"visitorDesc" -> s"bulk05-${scala.util.Random.nextInt(10000)}",
"pkgId" -> (scala.util.Random.nextInt(900) + 10000)
))
val importVisitManagerScenario = scenario("Import Visit Manager")
.feed(dataFeeder)
.exec(session => {
val pkgId = session("pkgId").as[Int]
val visitorDesc = session("visitorDesc").as[String]
val updatedSoapBody = xmlTemplate
.replace("${visitorDesc}", visitorDesc)
.replace("${pkgId}", pkgId.toString)
session.set("updatedSoapBody", updatedSoapBody).set("pkgId", pkgId)
})
.repeat(5, "requestIndex") {
exec(http("Post Import Visit Manager")
.post("/ietp-s1000d-master/ws/visitimport")
.headers(commonHeaders)
.body(StringBody("${updatedSoapBody}"))
.check(status.is(200))
.check(bodyString.saveAs("responseBody"))
)
.exec { session =>
println(session("responseBody").as[String])
csvFileWriter.println(s"${session("pkgId").as[Int]}")
session
}
}
val bulkOpenScenario = scenario("bulkopen")
.exec(
http("request_0")
.post("/ietp-s1000d/getSearchVisitResults.do")
.headers(commonHeaders)
.formParam("description", Configuration.description)
.check(jsonPath("$.pkgId").saveAs("pkgId"))
)
.pause(26)
.exec(
http("request_25")
.post("/ietp-s1000d/openAndOrPrintVisits.do")
.headers(commonHeaders)
.formParam("visits", "${pkgId}") // Use Gatling Expression
.formParam("printOrder", Configuration.printOrder)
.formParam("printQueue", Configuration.printQueue)
)
.pause(10)
.exec(
http("request_69")
.post("/ietp-s1000d/getOpenAndOrPrintVisitsResults.do")
.headers(commonHeaders)
.formParam("visits", "${pkgId}") // Use Gatling Expression
)
// Close CSV writer after both scenarios
after {
csvFileWriter.close()
}
// Setup both scenarios
setUp(
importVisitManagerScenario.inject(atOnceUsers(2)),
bulkOpenScenario.inject(atOnceUsers(2))
).protocols(httpConf)
.maxDuration(5 minutes) // Set the total duration of the simulation
}
```
---
### Author:  [@slandelle](https://community.gatling.io/u/slandelle)
#### Post date: [March 4, 2024, 11:18am UTC](https://community.gatling.io/t/implicit-conversion-error/8778/2 "2024-03-04T11:18:20Z")
Remove your extra conflicting import: `import io.gatling.core.session.Expression`.
Note: If you’re not a Scala developer (which you don’t seem to be), you should consider using the Java SDK instead of the Scala one.
---
### Author:  [@balaji](https://community.gatling.io/u/balaji)
#### Post date: [March 4, 2024, 1:55pm UTC](https://community.gatling.io/t/implicit-conversion-error/8778/3 "2024-03-04T13:55:37Z")
Im trying to replace this
PkgId
10412
10426
10161
10829
10123
10791
10325
10471
10165
10720
in place of formparam. But im getting this conversion error
private val scn = scenario(“bulkopen”)
.feed(csvFeeder)
```
.exec(session => {
val processedPkgID = session("pkgId").as[String]
println(s"Processed pkgID: $processedPkgID")
session.set("pkgId", processedPkgID)
})
.exec(
http("request_0")
.post("/ietp-s1000d/openAndOrPrintVisits.do")
.headers(headers_0)
.formParam("visits", session("processedPkgID"))
.formParam("printOrder", Configuration.printOrder)
.formParam("printQueue", Configuration.printQueue)
```
Pls help
---
### Author:  [@system](https://community.gatling.io/u/system)
#### Post date: [April 3, 2024, 1:55pm UTC](https://community.gatling.io/t/implicit-conversion-error/8778/4 "2024-04-03T13:55:41Z")
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