Solved: Vanishing objects in desktop client - Qlik Community

Report Inappropriate Content · ‎2014-01-22

Hi there,

our users are facing a strange problem: sheet objects (text boxes, buttons, list boxes, charts...) vanish from the sheet when the application is opened in the desktop client. If for example entries in a listbox are selected about half of the other objects on a sheet disappear.

To make them appear the users have to click on the title of one of the existing objects or in the background of a gauge or a text object.

Please see attached picture for details. on the leftyou see what it should look like and on the right what it looks like when something is selected.

At first I thought about a problem with their graphics board but I am facing the same problem now. Plus this only occurs with one application, we never had this problem with any other application.

The application is rather small (filesize 8,5MB) and the data structure is not complex (checked that with the Governance Dashboard).

We are using QV 11.0.11440 SR2.

We never see this problem while opening the application via the Internet Explorer. It only comes up when the application is opened in the desktop client. Here we can open via "open in server" or simply via "open". Both ways lead to vanishing objects.

Did someone ever experience this behavior? I have no clue how to solve that problem.

Thanks and best regards,

Chris

Report Inappropriate Content · ‎2014-01-22

At the end of the day there is "light at the end of the tunnel" as we say in german

Triggers were no problem but it was the resizing itself.

Working with the original resolution worked fine but as soon as you changed it (not matter if you did with macros or by clicking on View - Fit Zoom To Window) objects started to disappear after making selections or click on buttons.

Changing the resolution back to the original solution fixed the problem.

To be able to still provide the FitZoomToWindow-function I created a transparent textbox with a show conditional:

=if(Even(Second(time(now()))),0,1)

The textbox is shown if the current second is odd and hidden if it is even.

By switching the textbox "on and off" the vanished objects come back to life as it immitates the user cliking somewhere.

In the worst case the user has to wait nearly a second but usually it is not taking that long.

I was trying to switch it for example every 0.5 seconds but I could not get the milliseconds.

I guess that is not possible.

However, at least I found a workaround for that. Maybe I can think of a better solution but this gives us the chance to go on like before for the time being.

Thanks for your help,

Chris

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sudeepkm · ‎2014-01-22

If possible then can you pls scramble the data and attach the QVW ?

Have you tried creating another QVW being a copy of the original document?

Report Inappropriate Content · ‎2014-01-22

Hi,

Can you please share the application.

It may be some text object whose layer is greater than other objects.....

stevedark · ‎2014-01-22

Hi Christian,

My guess is that it is the Layer properties, set on the Layout tab. If objects have the same Layer value it can be a bit random as to which way around the objects are shown. You should be able to get by setting some to Top and others to Bottom - but you can set a number if you need to specify more layers.

If it is not that, can you please test if it is the text box vanishing completely or just the value not showing (less likely). You could do that by changing the colour of the text box background and turning off the transparency temporarily.

Hope that helps.

Steve

Report Inappropriate Content · ‎2014-01-22

Please make sure that layer value of you text boxes is higher that the object on which they are placed...

Report Inappropriate Content · ‎2014-01-22

Performance could be slow because of low RAM, suggest you to increase the RAM and check.

Report Inappropriate Content · ‎2014-01-22

Hi guys,

unfortunately we're not allowed to post our application even if they are scrambled.

I already checked the layers, they are ok.

Even new objects with standard layers settings placed on an empty sheet vanish after making selections in a list box or so.

I just tried to add a new table but I only see this error message instead of a table: "Allocated memory exceeded".

Maybe it really a performance issue. Strange thing is that it only happens with this one application.

We have applications with 10 times or even 100 times more data and everything is ok.

BR,

Chris

sudeepkm · ‎2014-01-22

First I thought you are seeing a white patch (as described in the image) instead of the actual Object. As Steve and Arun have suggested please check the text object layout.

Another way to look at this option is to go to the sheet properties (right click on the sheet then properties) and find your text object and check the Layout. sometimes it could be hidden based on a condition. You can check the hidden Objects by looking at the ShowMode attribute. so looking at the Objects properties from the Sheet properties could help.

sudeepkm · ‎2014-01-22

Have you checked the Task manager how much memory and CPU time the QV.exe is taking when you open this file and select an item in the list box.

stevedark · ‎2014-01-22

It is sounding like performance. As it is a small app there may be

something horrid in the data model (big synthetic key or loop) or a

particularly inefficient query (nested IF statements instead of Set

Analysis). Look at any opportunities for optimising, and as has been

suggested look at the Objects tab for more information.

- Steve