topic Re: How to Solve : Qlikview system.argumentnullexception value cannot be null in QlikView

How to Solve : Qlikview system.argumentnullexception value cannot be null

sarafamiglietti — Mon, 26 Jan 2026 18:19:17 GMT

Hello,

I have a task which is scheduled several times a day and which works fine but sometimes an error occurs randomly.

I searched on the community how to solve this problem without success.

Error

The task "XXXX.qvw" failed. Exception: || QDSMain.Exceptions.TaskFailedException: Task execution failed with errors to follow. ---> System.ArgumentNullException: La valeur ne peut pas être null. || Nom du paramètre : stringToUnescape || à System.Uri.UnescapeDataString(String stringToUnescape) || à QDSMain.DistributeTask.GetFileName(String path) || à QDSMain.DistributeTask.Execute(TaskResult currentTaskResult) || --- Fin de la trace de la pile d'exception interne --- || à QDSMain.DistributeTask.Execute(TaskResult currentTaskResult) || à QDSMain.Task.AbstractTask.TaskExecution(ILogBucket logBucket, TaskResult taskResult)

Qlikview version : 11.20 SR12

Operating system : Windows Server 2012 R2 Standard (64 bit edition).

Can someone help me?

Thanks&Regards

Sara

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sasikanth — Mon, 21 Dec 2015 09:36:35 GMT

check the below link

Scheduled upload failing

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sarafamiglietti — Mon, 21 Dec 2015 09:56:49 GMT

Hi,

I have read this post and I have noted that:

"..this happen when a change is made directly or indirectly affecting the QV Service Account."

But what kind of change can cause this error?

Why my other documents are reloaded without error?

Thanks&Regards

Sara

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sasikanth — Mon, 21 Dec 2015 10:15:58 GMT

How often you are getting the same error in a day?

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sarafamiglietti — Mon, 21 Dec 2015 10:19:28 GMT

It's random...

For certain applications never, for others : 0 à several times in a day.

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

simospa — Mon, 21 Dec 2015 14:12:12 GMT

Hi,

try to create a new user in your machine, insert it in Local Administrators and QlikView Administrators.

Then go to Services, find that beginning with "QlikView", and stop them. Then right click and Properties on all of them, then specify that account and password and restart, then retry.

Let us know.

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sarafamiglietti — Mon, 04 Jan 2016 13:19:21 GMT

Hello,

I checked the Windows Event logs and I get this error:

SE_LOG: User - GetStringS: Failed to LookupAccountName. Domain (\\LDAP Server), Name (QLIKVIEW user).

So the problem is due to a problem on the LDAP Server.

Problem solved.

Thanks for your help.

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sarafamiglietti — Mon, 11 Jan 2016 11:28:26 GMT

Hello,

I still have the problem.

I will try to create a new user in my machine as mentionned by Simone Spanio.

But I have one question : Why should the user be created in the machine? What if it is an LDAP user?

Thanks&Regards

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

simospa — Mon, 11 Jan 2016 14:26:44 GMT

Sara,

Local Administrators group grants its users with permissions to interact with administrative tasks in the operating system.

Take a look here:

QlikView Admins vs Local Admins | Qlik Community

Let me know!

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sarafamiglietti — Wed, 13 Jan 2016 08:28:59 GMT

Hello,

I have created local users who is Qlikview admins and local admin.

But I still have the problem.

Do I missed a step?

In the QMC, Where can I see which user launch document reload?

Thanks&Regards

Sara

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sarafamiglietti — Wed, 13 Jan 2016 14:21:14 GMT

Actually, It was worst after creating a local user.

I had a lot of Directory Service Connector problem.

After reading this post:

Directory Service Connector is offline

The reason was : "this appears to be a domain policy that will not allow a non-domain user to query the AD. I have seen this in the past".

So back to the square one...

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

sarafamiglietti — Thu, 28 Jan 2016 08:24:58 GMT

Hello,

On the Server, there were two .NET Framework versions installed : 3.5 and 4.5.

As Qlikview uses .NET Framework 4.0 which is included in 4.5 version (See Qlikview Server > System > About), we uninstalled .NET Framework 3.5 and we no longer had the problem!!!!!!!

Problem solved!

Re: How to Solve : Qlikview system.argumentnullexception value cannot be null

simospa — Fri, 29 Jan 2016 07:53:23 GMT

Good!