# No marshal\_dump is defined for class

**URL:** <https://www.ruby-forum.com/t/no-marshal-dump-is-defined-for-class/174174>\
**Category:** Rails\
**Created:** [August 21, 2009, 7:16pm UTC](https://www.ruby-forum.com/t/no-marshal-dump-is-defined-for-class/174174 "2009-08-21T19:16:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![rafaelrosafu](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/59ef9b/32.png) [@rafaelrosafu](https://www.ruby-forum.com/u/rafaelrosafu)\
**Post date:** [August 21, 2009, 7:16pm UTC](https://www.ruby-forum.com/t/no-marshal-dump-is-defined-for-class/174174/1 "2009-08-21T19:16:16Z")

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Hi all,  
Does anyone knows what this error message means?