The first I'd like to ask, is whether you used the 'Map 3D' reader to read your autocad drawing. It is possible that the attribute is part of the Object Definition and in that case you should use this specific reader (or the Civil reader) and not the regular DWG-reader.

I hope this helps.

Thanks for fast reply I tried both but I don't find the extended data I want.

Hi,

Is is possible to provide sample file?

Pratap

Hi everybody !

Thank you for your answers but after a few research I think it's not possible to write in an Extended data ...

Nevertheless, I was able to add my UAID attribute in my acad with a simple attribute manager. I gave up the extended data. My new problem is that I would like to export my ACAD file in IFC and find my UAID in it. But it's not ...

Hi,

I have seen the dwg file you hav sent. If you are using FME 2017, kindly have a look at the below thread and link

https://knowledge.safe.com/questions/40735/why-am-i-getting-the-error-error-using-autocad-od.html

https://www.safe.com/fme/formats-matrix/#showPlatforms=true

3D object data has been present only in 64bit but not in 332bit.

Since I have FME 2014 in my work station, so I have opened in that version and able to see the attribute you have mentioned with Autodesk AutoCAD Map 3D Object Data reader. I have attached the screenshot to this thread.

So, I hope you are working on 32bit.

Pratap

safe.jpg

In the attachment is a really easy workspace that just generates a dwg that add extended entity data to a point. If you cannot see that attribute in your inspector, then I don't think the problem is FME related. It will have to do something with your machine (32 vs 64 bits, older versions of autocad, ...)?

none2acad.fmw

There are many method of storing attribute data in AutoCAD/Civil3D

Object Data (FME READ/WRITE): is attribute data that is attached to individual objects and stored in tables in the drawing. Object data tables store text and numerical information related to an object.

Property Set Data (FME NONE YET): You attach property set data to objects by attaching one or more property sets, defined by a property set definition. After property sets are attached, the values for automatic properties are determined from the object, and you can enter values for the manual properties. This has big promises for the future but current FME is not able to read or write

ESRI Mapping Specification for CAD (FME READ/WRITE): ESRI has also created a new data specification, the mapping specification for CAD (MSC), which is a method of defining and creating GIS content using AutoCAD files and ArcGIS for AutoCAD. FME has read and write but is limited to the basic field type (no domain, no range). If you use an ArcGIS Web Service for clip and ship, you will see the full power but then DWG has problem with too much data

Extended Data or Extended Entity Data or XDdata (FME READ/WRITE): is hidden from the user, it makes it harder to modify without using a custom application within Autodesk. Some new Express Tools are available ie XDList