[Koha] problem in generating a barcode

[april]

system: koha 2.2.9 fedora 14

im having a problem with the barcode it always says:

Can't find inventory codes in that range. Please try again.

[Tue Feb 07 14:44:02 2012] [error] [client 10.0.2.95] [Tue Feb  7 14:44:02 2012]
barcodes.pl: Use of uninitialized value in numeric eq (==) at
/usr/local/koha/intranet/modules/C4/Auth.pm line 195., referer:
http://10.0.2.95:8080/cgi-bin/koha/barcodes/barcodes.pl

please help...

thanks,

April Gallana
TIP