Hi Laure-Hélène,
You should package the ComplexData using CDATA as shown below:
wps:Data
<wps:ComplexData mimeType=“text/xml; subtype=gml/2.1.2”>
</wps:ComplexData>
</wps:Data>
Probably this will work.
Best regards,
Roel Janken
R&D Manager, Data & Content
ICT Meteovista
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