Has anyone been trying to import an XML file from Hansoft with success?
I don’t know what exactly do you mean when you say “XML from Hansoft”, however, XML is a language which allows for adding some structure to text. The semantics of the structure is up to applications, and unless applications agree on some common semantics, one cannot simply feed XML produced by one app into another.
GanttProject can import XML with Microsoft Project structure and with GanttProject structure (.gan files are XML). You can’t import data from Hansoft unless it exports data in one of these two XML formats.
Not that it may help, but I have placed the file that I am trying to upload from Hansoft to Gantt.
Looks like their very own XML structure, sorry.
The most viable format for data interchange is MS Project, because it is the de-facto standard and many tools can import and export to MS Project.