topic Why this expression can not work? in Project data & BIM

Why this expression can not work?

pjatelier — Wed, 14 Aug 2024 20:28:18 GMT

Can not see why this expression does not work. The expression is set to Area and it is set to appropriate classification. When i have tried to simply set a simple value like 1m*1m instead of element property it works. But this way it only says can not be evaluated. Why?

expression:

IFS (Element Type = "Wall"; Surface Area of the Wall Outside Face (Conditional); Element Type = "Slab"; Area;Element Type = "Beam"; Left Side Surface; )

Operating system used: Windows 5003

Re: Why this can not work?

Xandros — Wed, 14 Aug 2024 15:02:05 GMT

@pjatelier wrote:

IFS (Element Type = "Wall"; Surface Area of the Wall Outside Face (Conditional); Element Type = "Slab"; Area;Element Type = "Beam"; Left Side Surface; )

The last semicolon might be the culprit. Try this:

IFS (Element Type = "Wall"; Surface Area of the Wall Outside Face (Conditional); Element Type = "Slab"; Area;Element Type = "Beam"; Left Side Surface )

Re: Why this can not work?

pjatelier — Wed, 14 Aug 2024 16:22:32 GMT

It is not that, i have translated it and have rewritten it from my language in AC it is correct. Anyway

I have found out that if anyone from three properties can not be solved, hole expression can not be solved. Even if the propriety is under condition that is false.

For example when i choose wall, then the "Left side surface" from beam can not be computed even if it is under false condition. AC is checking it so now i am looking for some way around how to say if you can not compute it than it is for example 0. any suggestions?

Re: Why this expression can not work?

vlahtinen — Thu, 15 Aug 2024 02:21:14 GMT

If I understood correctly what you're trying to do here, you could just put the parameters to different sequences. Archicad then tries to evaluate the sequences in order. If the parameter is not available for the element, Archicad moves to the next one. Note that since Area is a general parameter, it's available for most types if not all and the execution stops there. Therefore the Area parameter must be the last on the list.

In the screenshot below I have a wall, a slab and a beam selected.

Re: Why this can not work?

pjatelier — Wed, 14 Aug 2024 19:57:49 GMT

Super i will give a try

Re: Why this can not work?

pjatelier — Wed, 14 Aug 2024 20:04:58 GMT

Well that has solved it, Thank you very much, most important is the note, because i have tried before but unluckily i had global area on first place.