Conversion error possible; ABAP type is more restrictive - Only the EDM type may contain non numerical characters

Hi Everyone,

I recently encountered an issue when creating a gateway service which I wanted to share with everyone.

1.Create a data model from SEGW by importing DDIC structure(Custom) which has only one field with data type NUMC 10 as shown below.After importing service builder thrown an error like "Conversion error possible; ABAP type is more restrictive - Only the EDM type may contain non numerical characters".

2.I don't want to change the structure elements to fix the above issue since i wanted to import many standard structures whose Data types cannot be modified every-time.

3.To avoid this i followed below steps and by luck error is not thrown.(Go to Properties and removed the structure name )

I was able to fix but couldn't understand what really made the difference.

Experts could you please advise ? Please correct me if i went wrong anywhere.

Note :

Gateway SP level :

Regards

Prabaharan