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Thread: Civil3D changes value of INSUNITS when opening AutoCAD drawings

  1. #1
    I could stop if I wanted to
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    Default Civil3D changes value of INSUNITS when opening AutoCAD drawings

    Hi folks,

    Please excuse my naiveté, I'm really more of an AutoCAD guy. Hoping you can help sort this out.

    I have a client who is creating drawings in AutoCAD 2018 (AutoCAD Architecture as AutoCAD). The drawing is in millimeters, UNITS is set properly and INSUNITS is set correctly to 4 (millimeters).

    However, when their consultants open the same drawing in Civil3D 2018, the value INSUNITS gets changed to 6 (meters). We can repeat this behavior in house.

    Now, all the consultant has to do is set INSUNITS back to 4 in Civil3D and everything is fine, and the setting seems to "stick" when the file is reopened in Civil3D.

    But I guess my questions are...


    1. Why is Civil3D changing the value of INSUNITS on file open?
    2. Why only the first time the file is opened after being saved in AutoCAD?
    3. Is there a setting I can tell the consultants to change in Civil3D to stop this behavior?


    Thanks everyone.

    Any guidance is much appreciated.

    -JP

  2. #2
    Certified AUGI Addict cadtag's Avatar
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    Default Re: Civil3D changes value of INSUNITS when opening AutoCAD drawings

    i'd look for an acaddoc.lsp file that's setting the INSUNITS to a preferred setting. I use mine to force INSUNITS to zero since '17 added the US Survey Ft setting and hosed all my older drawings.

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    Default Re: Civil3D changes value of INSUNITS when opening AutoCAD drawings

    Thanks cadtag,

    Sadly, I can't do much about any lisp their consultants may have set up. However, we get the same behavior in house and we're just using an "out of the box" install of Civil3D, no modifications of any kind.

    I'll keep everyone posted if I find anything.

  4. #4
    Administrator rkmcswain's Avatar
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    Default Re: Civil3D changes value of INSUNITS when opening AutoCAD drawings

    I'm not sure if this setting is changing INSUNITS at each drawing launch, but if the checkbox "Set AutoCAD variables to Match" is checked on, INSUNITS will be changed at that time to match the C3D settings.

    Ref: Re: C3D 2018 automatically switching to US Survey Foot
    R.K. McSwain | CAD Panacea |

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    Default Re: Civil3D changes value of INSUNITS when opening AutoCAD drawings

    Hi

    Controll the settings for DWGUNITS in the template file, may be the templatefile has wrong setting and overrule INSUNITS. When i change the setting DWGUNITS "4,2,4,NO,YES,NO" the problem dissapear.

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