mapping a single row table to OPL

Hi

My single row table parameters is sometimes mapped as is in OPL :  

 {TParametres} parametresSingleton  = ...;
 TParametres parametres = first(parametresSingleton);

sometimes directly as :  

TParametres parametres = ...;

Is there a way to force the formulation ? Indeed, I also have an excel connector . Excel connector seems not to allow to read directly a tuple (it seems to require a tuple set). 

Thanks

David

 

Source: mapping a single row table to OPL