How to keep formula value different in a family type

[roscopeco2000]

I have added a value to my door schedule which will report 2 different dimensions depending if its a blockwork wall or stud(yes/no parameter). Problem is i need a different set of values if its a 2', 2,.3", 2,'6", 2,'9" door type. When i input a set of numbers for one type it changes it for all. I have set the parameter to an instance type so i don't get why this has happened. any ideas?

[Alfredo_Medina · Accepted solution]

Once you write a formula, the formula has the same effect in all the types of the family. 

You need: 

1) a new type length parameter, such as "Structural Opening_Blockwork",

2) a new type length parameter, such as "Structural Opening_Studs"

3) a change in the "Structural Opening" parameter: make it Type.

4) a change in the formula for "Structural Opening", like this:

if (Blockwork, Structural Opening_Blockwork", Structural Opening_Studs")

[L.Maas]

If your value depends on the family type you choose why make it an instance parameter?

Make it a family type parameter and set it to the desired value of each family type.

[roscopeco2000]

Ok i did what you suggested but now i just get a text report?, i need the parameters to be instant as the family types might be in 2 conditions at the same type.   

[Alfredo_Medina]

The "Structural Opening" parameter must be length, and type. Not text, not instance. 

The other two parameters must be type, not instance.

[Alfredo_Medina]

...and remove the quotes (") from the names of the parameters in the formula.

It should be length, not text.

[Alfredo_Medina]

In post # 2 above, I realize now that I put some quotes at the end of the names of the parameters. That was a mistake, please ignore those quotes.

[roscopeco2000]

Ok thank you but are you saying i cannot do an instant version? if so i need to rethink

[ToanDN]

Why do you need an Instance parameter? If your doors are sized by types then the lintel length parameter should be Type, same as the Door Width parameter. The Type parameter has two options: one is for block wall and the other is for framed wall. But that doesn't change the fact that it must be a Type parameter. You can post your family here if it is still not clear.

[roscopeco2000]

Ok toan maybe I am mistanding instances. I need to have one type in 2 possible states, this is what I thought instances were for? Ie I want the ability to have a 2.3" door to report a value for a block work opening and also another version of 2.3" to report as stud work opening.

[ToanDN]

No that is not it. The ability to have different values for block wall opening and stud wall opening is controlled by the formula.

Instance parameters are for for you to be able to have different values for the two exact same doors. For example, two doors of the same type, same dimensions, both in block walls, but they can have different lintel sizes - that's what an instance parameter is for.

[roscopeco2000]

Yes I think we are taking about the same thing. Let me try explain again. So the same type/size of door in a model that could be in a blockwork wall. I also want the same type/size of door in a stud work wall. Both require different structural openings depending on the type of wall they are in even though they are the same size door.I need these 2 options for 3 types of door in a family part so 6 results. Hence why I thought I needed an instance. I am now thinking the easiest way is to strip out the types and just have a 2"3 door family only(would need only 2 results). This would make the whole think easier. Sorry for the confusion I really want this to work. Thanks again

[ToanDN · Accepted solution]

Nope. Instance parameter only needed if you have two exact doors in the same exact block wall but with different lintel sizes.

[roscopeco2000]

Toan can you confirm with the above formula, will i need to delete out the door types? If i set the numbers for a 2'3" door the values stay the same for all family types?, if so i need to have individual doors? Thanks Ross

[ToanDN]

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@roscopeco2000 wrote:

Toan can you confirm with the above formula, will i need to delete out the door types? If i set the numbers for a 2'3" door the values stay the same for all family types?, if so i need to have individual doors? Thanks Ross

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No.  You don't have to delete the door types. 

Let's say you have the door type 1 (3'x7') and you insert two in a framed wall and another in a block wall, the formula will give the two in the framed wall the same value and the one in the block wall a different value.  Similarly, if you insert the doors type 2 (4'x8'), the formula with match the lintel size with the door size + the wall type (block vs framed).

[roscopeco2000]

Can someone help me finish this formula please, I have all the parameters sorted, i cant get the formula right. So if the Blockwork wall is ticked(yes/no para) i want to look at the structural blockwork opening and if its not ticked i want it to look at the structural studwork value. Then i want this to report in strutural opening, my crux is I dont know how to get it to report the value from a parameter.

[roscopeco2000]

Annoyingly it will report the value if there is no formula (see below)but as soon as i add an IF formula its says inconsistent units because its trying to report a text formula in a value one  

[ToanDN]

if (Blockwork Wall, Structural Opening_Blockwork, Structural Opening_Studs)

[Alfredo_Medina]

Please read carefully previous posts in this thread. Seems that the thread is going back to topics that were already explained above.

[roscopeco2000]

Apolgises if it is but I can't get it to work, I want it to report the value of structural opening, if I put your formula it's a text value in a length parameter so it doesn't work..