Hi Danny,
danielosko:
Sure,
Since I have so many products, (over 26,000), I use MS Excel for my data base and convert the files to .CSV files and then upload these files to my php/SQL server. The files I up load are Manufacturers, Categories, Categories Description, Products, Product Descriptions and Products to Categories.
This gives full control of my products and makes mass uploads easier.
So here is an example of my error in excel, which I converted into .CSV and uploaded into the products.sql

Hope this clarifies things a bit.
Danny
Now I understand you. Master category is actually a parent id.
Yes, of course, in this case, the program crawl categories used. I think that this force majeure error and I don't think that SitemapXML should check the logical integrity of the database.
Thanks for the bug report.