Error message

Warning: hash_equals(): Expected user_string to be a string, null given in CRM_Contact_BAO_Contact_Utils::validChecksum() (line 232 of /home/aspt/domains/civicrm.aspt.net/public_html/sites/all/modules/civicrm/CRM/Contact/BAO/Contact/Utils.php).

Membership Directory - Peter van Welzen

First Name
Peter
Last Name
van Welzen
Street Address (Main)
Gerda Brautigamsingel 88
Supplemental Address 1 (Main)
Supplemental Address 2 (Main)
City (Main)
State (Main)
ZH
Postal Code (Main)
Country (Main)
Phone and Extension-Phone (Main)
0615185358
Phone and Extension-Fax (Main)
Website
Research Interests
Euphorbiaceae of SE Asia.