Hello again
Well, the file is not yet a complete ymap either. It is a ymap.xml and you must first import this into OpenIV as OpenFormats, then a .ymap is generated there that you can export and you can simply pack this in the ‘stream/’ directory.
I have now done this once and everything works wonderfully for me.
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There is also some information in the forum here on how this works exactly. Alternatively, search YouTube for “openiv xml to ymap” or similar.
Also excuse my bad English…