ON ERROR question

[TerryRitchie]

I noticed that ON ERROR line labels can't be placed within subroutines:

SUB MySub()

    ON ERROR GOTO ErrHandler

    ... code

    ErrHandler:

END SUB

Is this normal? I'm using QB64pe v3.13.1

The Wiki states ON ERROR can be used in Subs/Functions but no mention of label being required to be outside of the Sub/Function.