Hey Raul,

Wouldn't you  need to use  ( 16 + i. 11 ) { a. or  ( a. {~ 16 + i. 11 )?

    ( 16 + i. 11 ) 9 !: 7 @ ( [ ^: 1 ) '+++++++++|-'
|domain error
|   (16+i.11)    9!:7@([^:1)'+++++++++|-'

    ( a. {~ 16 + i. 11 ) 9 !: 7 @ ( [ ^: 1 ) '+++++++++|-'

   9!:6 ''
┌┬┐├┼┤└┴┘│─

Cheers, bob

> On Oct 29, 2018, at 9:24 AM, Raul Miller <[email protected]> wrote:
> 
> ( 16 + i. 11 ) 9 !: 7 @ ( [ ^: boxy ) '+++++++++|-'

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