Problem decoding Code39

[MarcosOutomuro]

Hi!

I have detected a problem reading a barcode Code39. When I read it and decoding with my app, I always receive a bad decoding string.
The specific barcode I am using is this => 6/N1/IE521.523.
What I'm receiving from the code reader is this result => 6.1)E521.523. It seams that is converting the /N to a dot character and the /I to a ")"character.
I have made other test generating the barcode throught the Code39 extended encoding and works perfectly but unfortunelty I have to use the normal encoding.
As long as I know, this type of encoding allows to use the slash as a special character. Could you give me a solution to this issue?

Thank you in advance.