When trying to export a list of Contacts selecting a previously defined set of Export Fields, system throws this error:"Notice: Undefined index: in /home/.../Core/BAO/Mapping.php on line 622"
When exporting using primary fields, the export is successful.
What is the issue with Mapping.php?
This is a bug, albeit a minor one because of the simple workaround.
In PHP (the language most of CiviCRM is written in), there are various levels of problem: notice, warning, error, etc. A notice generally means, "This software's code has something ambiguous but not wrong about it. We're going to infer what the code's author meant to do, but they may want to make it explicit."
Good software strives to be notice-free, and CiviCRM is mostly notice-free. You've discovered an exception - though you haven't noted your CiviCRM version, so it's quite possible this is already fixed.
The reason this is less important than many other bugs is that notices should be suppressed on a live instance of CiviCRM - they should only really pop up if you're a developer. So the fix for this is to change your PHP settings to hide notices. This issue should go away after that. There's a few ways to disable notices; this Stack Exchange answer outlines them: https://stackoverflow.com/questions/2867057/how-do-i-turn-off-php-notices
I have found a corrupted line entry in the database table civicrm_mapping. Went to Administer >> System Settings >> Import/Export mappings and tried to delete the line entry, but the system hung there without completing the step.
DROPPED the tables CIVICRM_MAPPING, CIVICRM_MAPPING_FIELD, and CIVICRM_SAVED_SEARCH and recreated them from a backup copy (blank tables), but this still hasn't fixed the error.
When executing a contacts search and using "Select fields for export":
I get this error:
Notice: Undefined index: in .../joomla/administrator/components/com_civicrm/civicrm/CRM/Core/BAO/Mapping.php on line 622
Any ideas??
