Software error:

Global symbol "$form_isbn" requires explicit package name at /home/users/web/b1038/hy.mletenai/search_responsive.pl line 237.
Global symbol "$form_isbn" requires explicit package name at /home/users/web/b1038/hy.mletenai/search_responsive.pl line 238.
BEGIN not safe after errors--compilation aborted at /home/users/web/b1038/hy.mletenai/search_responsive.pl line 2874.

For help, please send mail to the webmaster ([email protected]), giving this error message and the time and date of the error.

[Sun Jul 6 03:45:30 2025] search_responsive.pl: Global symbol "$form_isbn" requires explicit package name at /home/users/web/b1038/hy.mletenai/search_responsive.pl line 237. [Sun Jul 6 03:45:30 2025] search_responsive.pl: Global symbol "$form_isbn" requires explicit package name at /home/users/web/b1038/hy.mletenai/search_responsive.pl line 238. [Sun Jul 6 03:45:30 2025] search_responsive.pl: BEGIN not safe after errors--compilation aborted at /home/users/web/b1038/hy.mletenai/search_responsive.pl line 2874.