Error sources and issues when writing Custom Field Types

These are issues and problems I've run into when writing my custom field types:

  1. 'Field type is not installed properly' error. When writing Custom Field Types it is important that the TypeName field in the fldtypes_xxx.xml file corresponds with the class name that actually implements your field type. Typos, renaming, and keeping implementation in sync with the xml-definition file(s) has been my "issue".

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