Why this error?

[nkls]

you have most likely used the variable name $sel earlier in the maya session...remember that all variables declared like that in the scripteditor are globals...

you should always try to use brackets around your scripteditor code to ensure you're not using global variables, like this:

{
string $sel[];
$sel....
}

[RetroAnimator]

That's right. The variable $sel seems to have previously been created as a string by you. Both codes you gave are correct.

[davegreenwood]

Ah ha, I suspected something like that, but just made a new scene, and did not quit and restart.
Thanks All.
Dave.

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