We are using SWs and SWs PDM and we are currently changing the coding of our products in our ERP system. Therefore we need to have the new code of each part shown in the BOM of our assembled models and on the Data Card of each part. 

The new code would consists of a combination of the Number variable of the model with some more characterization values - attributes of each part. For instance it could have o form of  ; Number - Length -width.

To do so I thought of naming the attributes the specify my 3D model as global variables and then I wished to create a custom property combining the values of the global variables. 

So I have those two global variables 

and wish to create a custom property like that; part_id = 1100 - 1400.

Just like that...I want the values to be visible and not have the equation performed.

So I created this variable in PDM, mapped it to the custom properties and then wished to write the above line inside the part's custom properties...

I tried doing that so 

But I can't get it to work...

Any ideas how to proceed?

Thank you in advance.