Transparent Background Problem

[Purplechris83]

Hi guys,

I'm new to this. I've been using the following method to cut a product out of a picture and make the background transparent:

Add Alpha Channel
Select Product image i want to keep using Free Select
Feather Image by 5,000 px
Invert
Clear

and this method has been working great until today where I have carried out the above method but when I put 5,000 px in Feather it won't accept it and keeps changing it to "50.00" px and then when I Invert and go to clear it makes the image a little transparent but I can still see the background. I have to keep pressing Clear 10 times until the image background is completely gone and then export but the image quality suffers and I'm wondering what I am doing wrong?

To try and fix this I have reinstalled GIMP twice (to a different directory the second time) and gone to Edit -> Preferences and Reset everything but I'm still having the same problem.

HELP! And thanks in advance.

[Ofnuts]

When you say "5,000" do you mean five or five thousands? If Gimp is set up for some default English, it is likely awaiting a dot (5.000) or nothing (5) if you meant 5 pixels.