🚀 go-pugleaf

Equations containing Symbol font characters are not being exported properly in EPS format, when saving a structured document as XML from FrameMaker 7.0. I'm using the following rule in the read-write rules:

element "math-graphic" {
    is fm equation element "math-graphic";
    writer equation {
        export to file "${docname}-math-graphic.eps" as "EPS";
    }
}

I have tested the resulting EPS using GSView 4.8 + GhostScript 8.53 and all Symbol font characters are missing. The info window reports that font '_Symbol' is undefined.

I have also created PDF from the EPS using Acrobat 4.0 and I get exactly the same result, only no errors are reported.

If I re-import the XML into FrameMaker, the Symbol font characters appear to be substituted by characters from the default font (Times New Roman in this case), which means that Greek letters are upright instead of sloped.

Any suggestions?