[Koha] Software errror - Can't call biblio on an undefined value

[Suresh Kumar Tejomurtula]

Hi

Ian getting the below error when I open a member record and it is happening
only for few records;

Software error:
Can't call biblio on an undefined value at /use/share/koha/lib/c4/members.pm
line 767

Koha version 17.11 on Ubuntu mariadb.

This error is not there in koha 16.05 for the same record.

Pls help me how to resolve the error.

Regards
Suresh kumar