AFP with custom font TTF generates space-letter-space

Hi,

I am producing an AFP file with Apache FOP 2.8 and java 17.
In my fo.xconf file am using a custom font with the TTF format and I have using also a xsl file. (you can find them below)
Altough then file renders properly when viewed with a tool like "Papyrus AFP viewer",
I have noticed that the content has issues when analyzed using AFPexplorer.
In the example below you see that the words are not generated words by words but space-letter-space which is causing problems during printing.

AFPexplorer
MDR:  1= A r i a l  2= a r i a l N  3= a r i a l N

PTX tag:
 A  r  i  a  l  a  r  i  a  l  N  a  r  i  a  l  N  B
ESC
AMB   223
AMI   236
SCFL  1
SVI   11

I do not understand what is missing to produce an AFP file with the correct structure.
Any help is welcome 🙂
Thank you for your time.
Jo

fo.xconf
<?xml version="1.0" encoding="UTF-8"?>

<fop version="1.0">

<!-- Base URL for resolving relative URLs -->
<base>.</base>
<!-- <font-base> </font-base> -->
<font-base>./</font-base>

<strict-configuration>true</strict-configuration>
<default-page-settings height="297mm" width="210mm"/>


<renderers>
<renderer mime="application/x-afp">

<renderer-resolution>240</renderer-resolution>
<images mode="color"/>
<fonts>
<font kerning="yes" name="Arial" embed-url="fonts/arial.ttf" >
<font-triplet name="Arial" style="normal" weight="normal"/>
<font-triplet name="any" style="normal" weight="normal"/>
</font>
<font kerning="yes" name="arialN" embed-url="fonts/arialn.ttf" >
<font-triplet name="arialN" style="normal" weight="normal"/>
<font-triplet name="sans-serif" style="normal" weight="normal"/>
<font-triplet name="Symbol" style="normal" weight="normal"/>
<font-triplet name="ZapfDingbats" style="normal" weight="normal"/>
<font-triplet name="any" style="normal" weight="normal"/>
</font>
<font kerning="yes" name="arialNB" embed-url="fonts/arialnb.ttf">
<font-triplet name="arialNB" style="normal" weight="bold"/>
<font-triplet name="SymbolNB" style="normal" weight="bold"/>
<font-triplet name="any" style="normal" weight="bold"/>
</font>
</fonts>
</renderer>

</renderers>

</fop>

XSL file

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"<http://www.w3.org/1999/XSL/Transform%22>>
<xsl:output />
<xsl:attribute-set name="borderActivity">
<xsl:attribute name="border">solid 0.1mm black</xsl:attribute>
</xsl:attribute-set>
<xsl:template match="/">
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format"<http://www.w3.org/1999/XSL/Format%22>>
<fo:layout-master-set>
<fo:simple-page-master master-name="first" page-height="29.7cm" page-width="21cm" margin-top="1cm"
margin-bottom="2cm" margin-left="2.5cm" margin-right="2.5cm">
<fo:region-body margin-top="1cm"/>
<fo:region-before extent="1cm"/>
<fo:region-after extent="1.5cm"/>
</fo:simple-page-master>
</fo:layout-master-set>
<fo:page-sequence master-reference="first">
<fo:flow flow-name="xsl-region-body">
<fo:block font-family="Arial" font-size="12pt">Arial</fo:block>
<fo:block font-family="arialN" font-size="12pt">arialN</fo:block>
<fo:block font-family="arialNB" font-size="12pt">arialNB</fo:block>
</fo:flow>

</fo:page-sequence>
</fo:root>
</xsl:template>
</xsl:stylesheet>


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