Add stategroup to existing code

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1

I want to add a stategroup to existing code, but migration release shows an error.
existing code:

    'lengte': number 'm'
	'breedte': number 'm'
	'oppervlakte': number 'm^2' = from 'm^2' product ( .'lengte' as 'm', .'breedte')
    'aantal elementen': number 'aantal'
	'aantal m^2': number 'm^2' = from 'm^2' product ( .'oppervlakte' as 'm^2', .'aantal elementen')
	'totaal prijs': number 'euro'= product ( from 'm^2'.'aantal m^2' as 'm^2' , .'spuitwerkprijs/m^2' )

new code:

'berekenen': stategroup (
	'ingeven' {
		'lengte': number 'm'
		'breedte': number 'm'
		'oppervlakte': number 'm^2' = from 'm^2' product ( .'lengte' as 'm', .'breedte')
		'aantal elementen': number 'aantal'
		'aantal m^2': number 'm^2' = from 'm^2' product ( .'oppervlakte' as 'm^2', .'aantal elementen')
		'totaal prijs': number 'euro'= product ( from 'm^2'.'aantal m^2' as 'm^2' , ^ .'spuitwerkprijs/m^2' )
	}
	'overnemen' {
		'aantal m^2': number 'm^2' = sum ( ^ ^ .'Fronten m^2', ^ ^ .'Fronten m^2', ^ ^ .'Zichtwanden m^2' )
		'totaal prijs': number 'euro'= product ( from 'm^2'.'aantal m^2' as 'm^2' , ^ .'spuitwerkprijs/m^2' )
	}
)
'totaal prijs': number 'euro' = switch .'berekenen' (
	|'ingeven' as $'b' => $'b'.'totaal prijs'
	|'overnemen'  as $'b' => $'b'.'totaal prijs'
)

migration release shows: an underscore under second berekenen (after switch $ .)

'berekenen': stategroup = switch $ .'berekenen' (
	|'ingeven' as $ = 'ingeven' (
		'lengte': number = $ .'lengte'
		'breedte': number = $ .'breedte'
		'aantal elementen': number = $ .'aantal elementen'
	)
	|'overnemen' as $ = 'overnemen' ( )
)

output shows:

error: 'attribute' `berekenen` was not found in 'attributes'.

how to address this error?

2

The stategroup 'berekenen' does not exist in your source model, so you can’t switch on $ .'berekeningen'. You have to choose a state for berekenen in the migration:

'berekenen': stategroup = 'ingeven' (
	'lengte': number = $ .'lengte'
	'breedte': number  = $ .'breedte'
	'oppervlakte': number = $ .'oppervlakte'
	'aantal elementen': number = $ .'aantal elementen'
	'aantal m^2': number = $ .'aantal m^2'
	'totaal prijs': number = $ .'totaal prijs'
)
3

thanks, it works, I had however to take out ‘oppervlakte’, ‘aantal m^2’ & ‘totaal prijs’