Problem with bar code BC_CD39

Hi,

I have problem with printing bar code BC_CD39.

I want to print material number (MATNR) as a bar code,

but there are materials with names like "PROD_1".

When I print this number error occurs: "!Err:Char=95"

I found out that code 95 is character "_" i ascii table.

The question is how to print this this char correct ???

Please help.

Regards,

Greg.