# Error CS0839: Argument missing

**URL:** <https://qa.fmod.com/t/error-cs0839-argument-missing/20352>\
**Category:** Unity\
**Created:** [June 24, 2023, 8:49pm UTC](https://qa.fmod.com/t/error-cs0839-argument-missing/20352 "2023-06-24T20:49:48Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![M0ajod](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/m0ajod/32/5124_2.png) [@M0ajod](https://qa.fmod.com/u/M0ajod)\
**Post date:** [June 24, 2023, 8:49pm UTC](https://qa.fmod.com/t/error-cs0839-argument-missing/20352/1 "2023-06-24T20:49:48Z")

</div>

hello i get this error in line 16 and 22 and what i miss to work the code this it :

using System.Collections;  
using System.Collections.Generic;  
using UnityEngine;

public class FMODEng : MonoBehaviour  
{  
FMOD.Studio.EventInstance CarEngine;  
FMOD.Studio.PARAMETER\_ID RPM;  
FMOD.Studio.PARAMETER\_ID AccelInput;

```
PG.CarController uvc;

void Awake()
{
	FMOD.Studio.EventDescription RpmEventDescription;
	CarEngine.getDescription(out, RpmEventDescription);
	FMOD.Studio.PARAMETER_DESCRIPTION RpmParameterDescription;
	RpmEventDescription.getParameterDescriptionByName("RPM", out RpmParameterDescription);
	RPM = RpmParameterDescription.id;
	
	FMOD.Studio.EventDescription AccelInputEventDescription;
	CarEngine.getDescription(out, AccelInputEventDescription);
	FMOD.Studio.PARAMETER_DESCRIPTION RpmParameterDescription;
	AccelInputEventDescription.getParameterDescriptionByName("AccelInput", out AccelInputParameterDescription);
	AccelInput = RpmParameterDescription.id;
	
	uvc = GetComponent<PG.CarController>();
}

void Start()
{
	FMODUnity.RuntimeManager.AttachInstanceToGameObject(CarEngine, GetComponent<Transform>(), GetComponent<RigidBody>());
	CarEngine.start();
}

void FixedUpdate()
{
	CarEngine.setParameterByID(RPM, uvc.EngineRPM);
}

void CheckAccel()
{
	if(uvc.MinRPM >= uvc.EngineRPM)
	{
		CarEngine.setParameterByID(AccelInput, 0f);
	}
	else if(uvc.MinRPM <= uvc.EngineRPM)
	{
		CarEngine.setParameterByID(AccelInput, 1f);
	}
}

```

}

---

<div class="post-metadata">

**Author:** ![Leah\_FMOD](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/leah_fmod/32/3685_2.png) [@Leah\_FMOD](https://qa.fmod.com/u/Leah_FMOD)\
**Post date:** [June 25, 2023, 11:47pm UTC](https://qa.fmod.com/t/error-cs0839-argument-missing/20352/2 "2023-06-25T23:47:57Z")

</div>

Hi!

> [@M0ajod](#):
>
> `CarEngine.getDescription(out, RpmEventDescription);`

> [@M0ajod](#):
>
> `CarEngine.getDescription(out, AccelInputEventDescription);`

There are commas in the function calls that shouldn’t be there. Removing them should fix the issue.