I have custom profile definition in my Schucal but after exporting file to my CNC machine software profile boundary is missing. [How to export dxf shapes to the machine]

Your CNC software needs profile DXF definition to be able to define profile clamping position and boundary. Majority of stock Schuco profiles are usually built in the CNC software but for any custom profile you need to manually export DXF definition form Schucal and import / save it on your machine. Go to General > Master data > User-defined clamping...