If I'm not mistaken, you should find them in the table _virtuemart_product_customfields > customfield_params.
Thank you, you're right. All the information are stored in only a memo field named "customfield_params"
I don't understand, this complicates everything, I don't see it right, but I'm not an expert.
I need to import a lot of products with multi-variant custom fields (2 ramifications) with more than 200 child products.
Obviously, I don't want to do the introduction manually.
I don't know how to import from a CSV file. Do you know any tools for import to VM with Multi variants products?
Kind regards.