[solved!]Coercing to Unicode Error when making gallery

[neo-naughtager]

Hey, everyone! I've been fooling around with this tutorial: https://youtu.be/3EhdfEwhKXs (That's part 3, by the way.)
And it's been working fin up until I try and add navigation buttons, specifically the "next" button for some reason. I'm trying to use it when there is a set of images that are unlocked, to go back and forth between them.

The error I'm getting:

Code: Select all

 After initialization, but before game start.
  File "game/gallery.rpy", line 63, in prepare_screen
    screen gallerycloseup(images):
  File "game/gallery.rpy", line 63, in prepare
    screen gallerycloseup(images):
  File "game/gallery.rpy", line 74, in prepare
    if closeuppage < len(images) - 1:
  File "game/gallery.rpy", line 74, in prepare
    if closeuppage < len(images) - 1:
  File "game/gallery.rpy", line 75, in prepare
    textbutton _("Next"):
  File "game/gallery.rpy", line 75, in prepare
    textbutton _("Next"):
TypeError: coercing to Unicode: need string or buffer, int found

The piece of code I think it's yelling about:

Code: Select all

if closeuppage < len(images) - 1:
        textbutton _("Next"):
            action SetVariable("closeuppage" + 1)
            xalign 0.9
            yalign 0.97
            background "black"

[neo-naughtager]

Oop! I found out the issue.
I simply forgot a comma, and to name the variable
it should look like:

Code: Select all

action SetVariable("closeuppage", closeuppage + 1)