Topic: SVGs with layers don't work | Evil Mad Scientist Laboratories

This topic has 1 reply, 2 voices, and was last updated 6 years, 1 month ago by Windell Oskay.

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October 4, 2018 at 8:44 pm #26884
jcharney
Participant
I’m getting errors whenever layers are present in my svg file, whether they’re created in Inkscape or elsewhere (Adobe Illustrator). I tried multiple layer methods (using the syntax as well as hiding layers). If I do a file with no layers everything is fine. I get this message whenever I try to do anything in the Axidraw extension, even just raising or lowering the pen:
```
Traceback (most recent call last):
  File "axidraw.py", line 2719, in <module>
    e.affect()
  File "/Applications/Inkscape.app/Contents/Resources/share/inkscape/extensions/inkex.py", line 265, in affect
    self.getposinlayer()
  File "/Applications/Inkscape.app/Contents/Resources/share/inkscape/extensions/inkex.py", line 207, in getposinlayer
    x = self.unittouu( xattr[0] + 'px' )
  File "/Applications/Inkscape.app/Contents/Resources/share/inkscape/extensions/inkex.py", line 351, in unittouu
    return retval * (self.__uuconv[u.string[u.start():u.end()]] / self.__uuconv[self.getDocumentUnit()])
  File "/Applications/Inkscape.app/Contents/Resources/share/inkscape/extensions/inkex.py", line 304, in getDocumentUnit
    p = param.match(svgwidth)
TypeError: expected string or buffer
```
Files without layers seem to work fine.
I’m using the V3/A3 with Inkscape 0.91 on Mac OS X 10.14 Mojave
October 5, 2018 at 5:35 pm #26885

Windell Oskay
Keymaster

The error appears to indicate (though not very clearly) that the document does not have physical units set. Files that you plot are required to have physical units (typically inches or mm), and trying to plot files constructed for screen display can sometimes give unpredictable results.

I am not certain that this issue is (or is not) directly related to the layers issue.

As a first suggestion, please try plotting one or more layers from the “birthdayCard_outlines.svg” example file, just without pen or paper. You can find that file in our standard example set download, in the “from launch video” folder.

If that file plots correctly, it would suggest that there is an issue specific to something in your file. If it does not, then there’s likely something amiss in your software setup. In either case, it should point the way forwards.
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