Problem to open a PDS4 NASA image with label in XML format

[thomasappere]

I'm using a set of procedures to open a PDS4 NASA .IMG image with label in XML format: https://github.com/Small-Bodies-Node/pds4-idl/
However, the read_pds.pro procedure crashes, returning the error: Procedure not found: IDLFFXMLDOMDOCUMENT__DEFINE
The error comes from the procedure read_xml.pro, line oDoc = obj_new('IDLffXMLDOMDocument', filename = filename, schema_checking = validation, /exclude_ignorable_whitespace, validation_mode = validation, /expand_entity_references)

The syntax is: image=read_pds('/Users/username/Downloads/filename.xml')

An example of .IMG file and its accompanying .xml label can be found here: https://pds-imaging.jpl.nasa.gov/beta/archive-explorer?mission=mars_2020&bundle=mars2020_mastcamz_ops_calibrated&uri=atlas:pds4:mars_2020:perseverance:/mars2020_mastcamz_ops_calibrated/data/sol/00049/ids/rdr/zcam/ZLF_0049_0671290293_241RAD_N0031850ZCAM05009_110050J01.IMG-

I'm using GDL Version v1.1.2_testing3-4-g62f299d7-dirty on a Mac Mini 15.6.1
I tried the same procedure on an older MacBook Pro 2012 with IDL Version 7.0.1 and it works like a charm.

Thanks a lot for your help.

[GillesDuvert]

@thomasappere Sorry, GDL has a basic implementation of IDLffXmlSax, but no IDLffXmlDom ...