Model disappear in plan view

[Mat.Syaf]

Hi, why the model in plan view disappear when I untick  end gable parameter while the parameter is for other element, not the main element. This happen only in plan view. The model is still there if in 3D view.

[Mahmoud.Ziedan]

@Mat.Syaf 

First of all you have these two parameters controlling the vis of the main element:

because The Dim Length is 1000,then the Mod Single is activated.

Second thing to know about is ,the presentation in the floor plan for this element is turned off

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[Mahmoud.Ziedan · Accepted solution]

@Mat.Syaf 
I forgot to mention also that this family is speciality Equipment,so when you turn off these two elements that they are connected from the ground to a specific height ,the cut plane of the view will be crossing these elements.BUT when you turn them off then the family will not be cutting anymore and then you will not see the element.
For this problem there are many solutions ,one of them you can add a line from the bottom to the top and this line will be invisible line.

[barthbradley · Accepted solution]

Use the Model Line Trick. 

https://revitoped.blogspot.com/2008/01/aaaahthe-old-invisible-line-trick-eh-99.html

[Mat.Syaf]

@Mahmoud.Ziedan Hi, Thank you for the idea.

Firstly, yes I've created a parameter with "single" and "multiple" option  is to hide the model once the dim length is changed. I don't think it is the issue to disappearancy of the model. If the dim length is below 1200mm, "single" parameter should be activated and the lines that link to the parameter should be appear too.

Secondly, I don't all 3D element to be appeared in the 2D plan. If you see the element which link to the "multiple" parameter, the presentation in the floor plan for this element is also turned off. I don't think it is the issue.

Thirdly, yes. I have found that the cut plan is at 2600 at first but when I change to 2800, the model is appear. But I still don't undertand why if the dim length is more than 1200, the model appear, but when it change to below 1200, the model disappear. Both dim lenght is use the same View Template and same Cut Plane.

anyways, thank you for the suggestion and the idea. 

[Mat.Syaf]

okay I understand now what happen. Thanks bro for the solution.