Probleme with system barcode in sap script
I have created new system barcode in SE73 (C39 barcode symbology).
My requirement is to print information e.g. material number with '*' as starting and end character to ensure barcode reversibility. Also i need to add '@' symbol before material number.
Finally my barcode has information as ($MaterialNumber).
When i used this Zsystem barcode in sap script, i can able to see barcode layout however i am not able read this barcode information.
When i removed special characters like * and @, i can able to read information. But as per my requirement, i need to print ($MaterialNumber) information in barcode format.
Can anyone let me know what would be the exact problem.
Also let me know exact steps for creation and implementation of system barcode..
Thanks in advance.........