Error 7 Critical glue error

[SunsetRunner]

hello the community

I'm faced to a strange error : it's nickname is "Error 7 Critical glue error"

it's occured when I try to check which icon is displayed in a button

app code =

 if (ScreenMode.image=="BTN-soleil-32.png"){ ModeScreen = 0;}

it's not really an error (no direct link to the line of this code) and it does not create a bug.

anyone has an idea ?

thanks by advance

[Gondwana]

I'd be carefully checking whether ScreenMode is declared and accessed consistently and correctly across the relevant .gui and .js files.