Dimension change fter dwg save

[ptl113]

After exporting to DWG, the dimensions changed compared to the ArchiCAD source. In AC we use dimensions up to 4 decimal places, as shown in the picture, and this is how we edit the elements. However, when exporting to DWG and checking the values, different dimensions appear. What could be the issue?

Operating system used: Windows

[Barry Kelly · Accepted solution]

I think you will find that in Archicad you are using meters with 4 decimal precision.

That would be the same as millimeters with 1 decimal precision.

Either way that is the maximum precision Archicad will display.

In the DWG you are looking at millimeters with 4 decimal precision - much higher precision.

If you round that up, that is exactly the figure you are seeing in Archicad.

2449.9563mm = 2.4499563m 

2.4500m when round to 4 decimal places.

Barry.