Hi,
thank you for your suggestion.

This is what I came up with, I post it here for reference and improvements.

[...]
		//S_FILLER s(*vm); Crashes if it contains int or double
		S_FILLER s;
		S_convert(&s,vm);

[...]

	template <class T>
	void S_convert(T * s, ValueMap * vm){
	
		for(int i=0;i<vm->GetCount();i++){
			
			Ref r=s->GetRef(SqlId(vm->GetKey(i)));
			if(r.Is<double>())
				s->Set(SqlId(vm->GetKey(i)),StrDbl(AsString(vm->GetValue(i))));
				
			if(r.Is<int>())
				s->Set(SqlId(vm->GetKey(i)),StrInt(AsString(vm->GetValue(i))));
				
			if(r.Is<String>())
				s->Set(SqlId(vm->GetKey(i)),AsString(vm->GetValue(i)));
		}
		
	}