Your extension is great, worked exactly as described and I WANT TO THANK YOU for your work and for the fact that you are sharing this extension freely.
I'm using OC 220.127.116.11 and Export/Import Tool (V3.9) .
I'm setting up a store with couple of thousands products and I uploaded some products with options, attributes and filters included.
All products were uploaded correctly and all Excel data is visible in the website and in phpMyAdmin database.
I am using also Mega Filter PRO/PLUS extension module in my website but the problem that I am about to describe is also available for default Filter module from OC. I'm using the third party extension for describing my problem because this extension makes also attributes and options filtrable, and the problem applies for all: attributes, options and filters.
So, here is the problem:
MegaFilter PRO/PLUS reads all the products from database, and the module shows the the attributes, options and filters in the module, with the corresponding number of products for each option in the filter:
The problem bumps when you click on an option: no result is served in the category page - Search Results - after the Import operation. Is like the code that reads the number of products with the corresponding attributes, options and filters from the database, but the code responsible for displaying those products is not working anymore.
After 2 days of searching for my errors and testing various options I found out that entering on the product in OC back-end and just hit "Save" button solves the problem.
I thought that I am not the only one having this problem and probably this will help others with this kind of problem.
But I'm also wondering if there is a more simple solution for this, like reindexing tables and something similar since is clear that some queries are not able to extract data from tables populated using your extension.
I apologize for my long description, but I wanted to be clear enough.