Price for Publish item, Free Option changes in to Check with seller ,  after the item detail page, you will see check with seller, and when you try to modify, you see deal option selected .

That is osclass bug. Can you reproduce on osclass 4.0.1?

Can i do core updates, in the general tap,
or I have to extract new Oc-admin OS 4.1  files to the Server Oc-admin files and override all the files.

You can test on demo.osclasspoint.com

I did it two tests. On demo. 1 i leave blanc for the price and it showed. Check with seller, 2. I wrote in the price txtbox free then it showed. Free at item. So my question is how can we fix my beta theme when i click free has to be free at the item page. Thanks.

I did it two tests. On demo. 1 i leave blanc for the price and it showed. Check with seller, 2. I wrote in the price txtbox free then it showed. Free at item. So my question is how can we fix my beta theme when i click free has to be free at the item page. Thanks.

Osclass has predefined values:
0 - free
empty - check with seller
... then any other positive value

Writing string (like "free") into field that is stored as decimal number does not make sense.

That is osclass bug. Can you reproduce on osclass 4.0.1?

Yes. This bug is still there in 4.0.1 and newer versions including latest OSclass 4.1.1

FREE option always changes to CHECK WITH SELLER.

@piter
Let me check that.

In the osclass translation, change Check with seller on Free not in the translation of the theme, but of the osclass