topic Re: Loop and Reduce Error in QlikView

Loop and Reduce Error

tresB — Mon, 26 Jan 2026 18:19:17 GMT

I was trying to reduce my app by bookmark. Got, error something like: 'Error: Failed to generate QVW files.. Exception=System.ArgumentException: Empty path name is not legal' . After a couple of alternate tries, I found that if I remove all my 'Always One Selected Value' from list boxes, the issue goes. Is this a known issue? Bug (QV 11 SR2) ? I would appreciate and thank for any shed of light on this.

Re: Loop and Reduce Error

stabben23 — Fri, 16 May 2014 17:43:18 GMT

Hi tresesco, I have also notis that if you try to reduce when you have Always One Selected Value selected, it wont reduce at all, very annoying.

Re: Loop and Reduce Error

Anonymous — Fri, 16 May 2014 17:46:12 GMT

I guess that the enforced selection in one box prevents looping in another, hence the "empty path".

It wouldn't hurt to submit as a bug though...

Re: Loop and Reduce Error

jaimeaguilar — Fri, 16 May 2014 22:26:17 GMT

I'm not sure if it's a bug. I think what qliktech would say is that is the expected behaviour, however it is kind of annoying. The problem is that you can't clear or override selections made by a one-selected value.

For example let's say you have a listbox containing Continent dimension and the selected value is let's say "Europe". Then if you have another listbox with Country Dimension and you try to select a country that is not in Europe, like Mexico (in other words that is not within possible values), then that selection in country will be disregarded because the one selected value has more hierarchy/importance/precedence or whatever you want to call it.

This is an issue that affects any process that include looping over possible values (like reduction, or even external apps like NPrinting),

regards

Re: Loop and Reduce Error

tresB — Sat, 17 May 2014 06:59:24 GMT

Thank you all for inputs. So, it's an issue !

Re: Loop and Reduce Error

ergustafsson — Mon, 19 May 2014 13:33:09 GMT

Hi Tresesco,

Please reach out to Qlik Support after testing this out in the latest release. You can that way get a response whether or not this is expected behavior or a bug.

Regards,

Erik

Re: Re: Loop and Reduce Error

tresB — Fri, 23 May 2014 05:50:28 GMT

Thanks Erik Gustafsson for your response. I am in touch with support(through my partner. This is another pain area that I can't directly contact Qlik support) and expecting a reasonable feedback. It seems a bit dicey. There has to be a pattern that can be found out - how qv is actually behaving. I have done couple of testings as in attached.

However, my live application(with much more data) shows a different error: '...Empty path name is not legal'.

Re: Re: Loop and Reduce Error

ergustafsson — Fri, 23 May 2014 06:33:13 GMT

Hello again,

Qlik has many direct customers, but in your case your license is acquired through a partner, which is why they should provide first level support according to a contract between the partner and Qlik Support.

An investigation might become a bit long to maintain here, which is why it might be worth reaching Qlik Support to get an in-depth analysis. One needs to analyze Task and DocumentLogs, QDS logs and a sample document in order to reach a full conclusion.

Regards,

Erik

Re: Re: Loop and Reduce Error

tresB — Fri, 23 May 2014 06:42:33 GMT

Hi,

I agree. By the time, I thought, may be people here in community could test some similar cases and kindly let know the outcome.

Re: Re: Loop and Reduce Error

ergustafsson — Fri, 23 May 2014 06:45:46 GMT

I agree, it is a good place to start - especially if there is an obvious solution.

Erik

Re: Loop and Reduce Error

Tue, 27 May 2014 07:08:27 GMT

Did you create the bookmark before Always one selected was applied?

Re: Loop and Reduce Error

tresB — Tue, 27 May 2014 07:42:50 GMT

Yes, and I guess it has to be so, otherwise the bookmark would take that single 'Always One Value Selected' value into consideration as bookmark selection which I don't want.

Re: Loop and Reduce Error

Tue, 27 May 2014 08:33:57 GMT

Bookmarks created before the "Always one selected"-flag is applied does not have this information, so the content of the bookmark can't influence the field with this property.

Re: Loop and Reduce Error

tresB — Tue, 27 May 2014 08:58:29 GMT

Thank you very much for your response. However, the results I got is not so. Could you please check my attached doc that describes my case study? Please share your views on that.

Re: Loop and Reduce Error

tresB — Fri, 30 May 2014 06:12:23 GMT

It has now been indentified as a Bug in earlier SR. I upgraded to QV 11.2 SR5 and tested; working fine. Thank you all for help.

Note: In my previous attached doc, I mentioned tested version - SR6 was a mistake; that was actually desktop version. Sorry for the confusion.

Re: Loop and Reduce Error

Thu, 30 Oct 2014 14:57:13 GMT

Hello have you upgraded QV server or Desktop?

Regards

Re: Loop and Reduce Error

tresB — Fri, 31 Oct 2014 05:21:39 GMT

Hi,

I upgraded both(that seemed more meaningful to me).

Re: Loop and Reduce Error

Fri, 31 Oct 2014 12:30:12 GMT

Exactly that was the right thing to do.

Regards