Autodesk Robot Structural Analysis

[#1]

Hello!
I created 4 wind load cases and 3 snow load cases. My problem is to create an envelope containing wind cases and another containing snow ones. Is it possible? By doing this I want to reduce the number of combinations generated my Automatic combinations module. My teacher recommended this, too.
I read that robot cant create envelopes. Is it true?
Thanks in advance.

[#2]

the goal - reduce the number of combinations generated my automatic combinations module?

[#3]

Take a look at:

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Automatic-Combination/m-p/3386869/highlight/...

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Group-the-Combination/m-p/3392707/highlight/...

Usefull zip in last post on this page;

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Select-Case-Component-No-Results/m-p/3390533

or here

http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Editing-load-cases-in-excel-API/td-p/3320573

[#4]

I was told its theoretically right to make a envelope combination - the Eurocode 1 says that. And the goal of course is reducing the number of combinations. It's a simple steel frame I don't need 200 combinations.
I've read the posts you told me but I see the only way is editing the load cases in excel? Grouping the combinations doesn't make a envelope of them, right?  Is there another way?
And if you don't understand me, I want to make a envelope as SAP2000 do it - it has a load combination type - envelope.

[#5]

200 is very little. 1 000 000 combines is normal. I use for that special program (I author). I do it for myself.

[#6]

And if you don't understand me, I want to make a envelope as SAP2000 do it - it has a load combination type - envelope.

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I think we do not understand you. Also, at least me, do not know what is envelope case\ combination in SAP.

Envelopes are generated automatically in Robot these ways:

[#7]

I want to create a envelope of 4 wind load cases and combine this envelope in ULS combinations, for example,
G+Q+0.5*envelope (Wind1; Wind2; Wind3; Wind4).
Thanks for the help.

[#8]

I want to create a envelope of 4 wind load cases and combine this envelope in ULS combinations, for example,
G+Q+0.5*envelope (Wind1; Wind2; Wind3; Wind4).

And the result of the above is ...?

Tell me what you want to get. 

[#9]

Tihs is a combination. I want the maximum values of the internal forces. Instead of combining dead and live loads with 4 wind load cases to be just 1. I hope I gave the right answer.

[#10]

Tihs is a combination. 

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Not possible.