Hi Tom, the AI file that MoI generates is in an old AI8 format. I guess InDesign does not support that old version and only supports the newer kind that Illustrator will export.
Around AI version 9 the AI format underwent a big change. V8 and earlier was similar to a limited subset of EPS. The newer style is actually a PDF file with an additional embedded copy of the file in Illustrator's private format.
Unfortunately it is not feasible for MoI to export the new kind because Adobe has not made any documentation on how that v9 embedded Illustrator data is structured. The only file format specification available is on the EPS-like AI8 format.
One thing you might try is to export to PDF format and then change the file extension to .AI instead. That will then be closer in structure to an AI9+ type AI file but it will be missing the additional Illustrator specific data in it. But maybe it will be handled differently by InDesign than the PDF import.
That seems odd that Indesign treats .AI and .PDF files differently, I don't know why they would only support importing vectors from one and not the other, that would be something you would have to ask Adobe about. I see some articles mention that Indesign can have problems with slow performance with vector content so maybe it has something to do with that.
- Michael
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