scheme : error in vector

[geka]

Hello,

I need to write a script for GIMP and I'm stuck on an error I don't understand.

I haven't found a solution to this problem.

Here's an example of a script that returns an error in a console schema:

Code:

(define
myvector (vector 'a 'b 'c 'd 'e)
)
(vector-set! myvector 2 'x)
Error: vector-set!: index must be exact: 2

Where is my error?

Thank you for your help.