Hi, I am a beginner. Exported all records and created patrons. Check out: While entering incorrect barcode, message displays "Barcode not found". Entering correct barcode, following error happens: -- Software error: Can't call method "branchcode" on an undefined value at /usr/share/koha/lib/C4/Circulation.pm line 711. -- Please look into it.
Please make sure that your items all have homebranch and holdingbranch (subfields a and b in your item edit form) set to a valid library in your installation. This should make the problem disappear. This kind of question is better suited for the mailing list: https://koha-community.org/support/koha-mailing-lists/