So I manage to accomplish this using this answer, now it comes another issue and I dont seem to understand it, before, the layout was divided with by SO using

lineitem_index

every SO has a lineitem asssigned and starts with zero, so

SO1

has

lineitem0

,

lineitem1

and

SO2

has

lineitem0

,

lineitem1

but with the solution of the link, for some reason now the all the line items now are from 0 to N items of the wave, meaning I dont have lineitem0 multiple times thus been able to divide the layout, I dont see why this is happening as the loops are the same

I may be wrong, but it seems you're flattening the array So originally (

wavedata

) was

[[a0,a1],[b0],[c0,c1,c2]]

But then you're adding each individual

lineitem

to an array so you end up with:

[a0,a1,b0,c0,c1,c2]

(and using

lineitem_index

just prints

0,1,2,3,4,5

)