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Thread: SUBTRACT Command Not working

  1. #1
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    Post SUBTRACT Command Not working

    I've been working on a project- a ten story building. To make windows within the main solid of the builing, I've been subtracting the window solid from the main solid. I've had no problem up until this point. No matter what I do, I can not subtract any solids from the main building solid. Is there a cap on how much you can subtract? I've checked to make sure everything is planar. It is. But I can no longer subtract.

  2. #2
    100 Club Spectrefish's Avatar
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    Default Re: SUBTRACT Command Not working

    Did you explode the solid by accident? What is your command line telling you?

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    Post Re: SUBTRACT Command Not working

    No, it has not been exploded. It is still a 3d solid. My command line tells me nothing. When I subtract from the main solid it just tells me how many solids i've chosen to subtract.

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    All AUGI, all the time bbapties's Avatar
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    Default Re: SUBTRACT Command Not working

    can you isolate those two solids...(the main solid and the one your trying to subtract) and post it... It might be easier to figure out whats going on by looking at it.

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    Post Re: SUBTRACT Command Not working

    The main building is in magenta. The window solids I am trying to subtract are yellow
    Attached Files Attached Files

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    All AUGI, all the time bbapties's Avatar
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    Default Re: SUBTRACT Command Not working

    Well I dont know how to fix it, but when I checked your main solid I got the following result...

    Command: _solidedit
    Solids editing automatic checking: SOLIDCHECK=0
    Enter a solids editing option [Face/Edge/Body/Undo/eXit] <eXit>: _body
    Enter a body editing option
    [Imprint/seParate solids/Shell/cLean/Check/Undo/eXit] <eXit>: _check
    Select a 3D solid: This object is not a valid ShapeManager solid.
    Enter a body editing option...

    this would explain y it will not subtract... but I think your main solid is bad....sorry, I cant help anymore than that

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    Certified AUGI Addict jaberwok's Avatar
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    Default Re: SUBTRACT Command Not working

    As bbapties says, the main solid cannot be modified now, you need to start over.
    Also, I notice that the solids (window openings) that you are trying to subtract are the same thickness as the wall. One of them is not exactly in line with the thickness of the wall so, even if you could subtract it, a "skin" would be left over the opening. I find it safest to make the part which is to be subtracted thicker than the part it is to be subtracted from and protruding both back and front.

    HTH

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    Default Re: SUBTRACT Command Not working

    Ugh. Thank you.

    Can I ask, what would make the solid not valid any longer?

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    Certified AUGI Addict jaberwok's Avatar
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    Default Re: SUBTRACT Command Not working

    Quote Originally Posted by dvilla2
    Ugh. Thank you.

    Can I ask, what would make the solid not valid any longer?
    One operation can be enough, it seems. Something like two vertices that are very, very nearly aligned but not quite - maths rounding errors really. That's why I made the remark about passing one part right through the other. I'm sure there are other possibilites too.

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    The Silent Type Mike.Perry's Avatar
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    Default Re: SUBTRACT Command Not working

    Quote Originally Posted by dvilla2
    Can I ask, what would make the solid not valid any longer?
    Hi

    Check out the following Technical Documents on the Autodesk web site under the Knowledge Base section -

    ID: TS19735 - Validate ShapeManager solids

    ID: TS22673 - Change size of solid object

    ID: TS22672 - Create region objects from 3D solid objects

    Have a good one, Mike

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