There is no tag for author in default framework. If import books framework cannot add author name. the following error shows Can't call method "auth_tag_to_report" on an undefined value at /usr/share/koha/lib/C4/Biblio.pm line 588. If add without auhtorname cannot search the books detail thorough search the catalogue.
In MARC21 the first author is stored in 100 and further authors in 700. Those are visible in the default framework and no error appears for me when I test adding an author/authority. I think this is more likely to be a problem with the installation/configuration or similar. Please bring this up on the mailing list and include information about the version of Koha you use, how it was set up, which MARC flavour you use and if you have changed your frameworks etc.
We are using 16.11. In that the field 100 name is General Procession Data (usually other versions named as PERSONAL NAME). 245 tag not is there. How can we add main title of the book, Thats why, i have download marc framework and import into koha.Mannual Installation have done. We have choosen MARC 21.
It sounds like you might have installed UNIMARC instead of MARC21? Please ask further questions on the mailing list.
How can install marc21?
This issue sounds more like a support request than a bug report. Support requests can be made on the Koha mailing list, on IRC, or by contracting with a support vendor. All these options are linked to here: https://koha-community.org//support/