[Koha] problems generating barcode with biblio in hindi and indic languages

Hi all we are testing barcodes labels koha 3.0 on centos for hindi and other indic language books. when we select hindi books for barcode labels (biblo/barcode) the pdf file will not open it will give error but for english barcode generated with biblio/barcode. we want to know from the experts what is the problem. with regards dpl