php - Magento Call to a member function setAttribute() on a non-object after adding 2 custom fields in address -

using magento 1.9.0.1, added module insert 2 custom fields address. please view codes in other question.

after installed module, billing address appears error:

fatal error: call member function setattribute() on non-object in /home/onceecom/public_html/dev/includes/src/mage_eav_model_attribute_data.php on line 80

the page has not been modified display new fields, error has appeared. how can debug such error?

p.s. not sure if it's related, modified customer address display options in system > configuration > customer > customer configuration > address template > html :

{{depend prefix}}{{var prefix}} {{/depend}}{{var firstname}} {{depend middlename}}{{var middlename}} {{/depend}}{{var lastname}}{{depend suffix}} {{var suffix}}{{/depend}}<br/> {{depend company}}{{var company}}<br />{{/depend}} {{if street1}}{{var street1}}<br />{{/if}} {{depend street2}}{{var street2}}<br />{{/depend}} {{depend street3}}{{var street3}}<br />{{/depend}} {{depend street4}}{{var street4}}<br />{{/depend}} {{depend chk_commercial}}{{var chk_commercial}}<br />{{/depend}} {{depend chk_residential}}{{var chk_residential}}<br />{{/depend}} {{if city}}{{var city}},  {{/if}}{{if region}}{{var region}}, {{/if}}{{if postcode}}{{var postcode}}{{/if}}<br/> {{var country}}<br/> {{depend telephone}}t: {{var telephone}}{{/depend}} {{depend fax}}<br/>f: {{var fax}}{{/depend}} {{depend vat_id}}<br/>vat: {{var vat_id}}{{/depend}} 

the chk_commercial , chk_residential 2 fields added. removing these 2 fields in settings not remove error.

i guess found out issue. of magento ce 1.9.0.1, config.xml structure used becomes invalid.

thus, use following tool re-generate module:

http://www.silksoftware.com/magento-module-creator/

hope helps others in need.