I'm running civiCRM 5.17.5 under Joomla 3.9.12

When I select a specific smart group with a saved field mapping for export, and select "Exclude contacts with "do not mail" privacy, no street address, or who are deceased.",

I get the error (note the error doesn't appear if I don't select Exclude contacts...):

Error#8247 message => string(27) "Cannot unset string offsets"string => string(0) "" code => 0 file => string(102) "/home/fcwm/public_html/administrator/components/com_civicrm/civicrm/CRM/Export/BAO/ExportProcessor.php" line => 176 trace => array (20) previous => NULL Cannot unset string offsets .../administrator/components/com_civicrm/civicrm/CRM/Export/BAO/ExportProcessor.php:176 171 public function setAdditionalFieldsForPostalExport() { 172 if ($this->getRequestedFields() && $this->isPostalableOnly()) { 173 $fields = ['is_deceased', 'do_not_mail', 'street_address', 'supplemental_address_1']; 174 foreach ($fields as $index => $field) { 175 if (!empty($this->getReturnProperties()[$field])) { 176 unset($field[$index]); 177 } 178 } 179 $this->additionalFieldsForPostalExport = array_fill_keys($fields, 1); 180 } 181 }

This error wasn't occurring prior to upgrading to 5.17.5

It doesn't happen with all my Saved field mappings, just one of them (but one I've been using for a few years without issue).

2 Answers 2


This was fixed in today's release (5.18.1)


To me this looks like a typo in the code and line 176 should be unset($fields[$index]) (plural fields).



Note that to trigger it you have to check that checkbox and also have one of the affected fields in your export mapping, like "Street Address".

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