exporting multi unit dimensions from idw to AutoCAD dwg
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I have an issue with exporting idw to AutoCAD files. When x mm [1/8 in] dimension is used in a drawing the AutoCAD drawing has the correct dimension style, however somewhere in the translation the inch value is specified as a bit of text on the end of the dimension. The issue that brought this to my attention is that occasionally it rounds down, some times and 1/8 sometimes 1/256, etc. So far its always down.
An example is 102 mm [4] becomes 102 mm[3 7/8]. In an ironic twist the model dimension is actually 4, we are rounding up from 101.6mm to get 102mm.
Also I experience this issue when we break views. That I understand because the dimension would no longer have a reference point. This confuses me because if we change the dimension style to something else then back we get the correct number, although there is an mm[3 7/8] stuck on the end.
Any thoughts as to what setting could be changed or looked at?