Error updating parent issue only, without importing childs

[sbriand]

Environment:

• Redmine version 2.3.3.stable
• Ruby version 1.9.3-p194 (2012-04-20) [x86_64-linux]
• Rails version 3.2.13
• Environment production
• Database adapter Mysql2 Redmine plugins:
• redmine_better_gantt_chart 0.9.0
• redmine_gsc_plantillas 0.1.0
• redmine_importer 1.2.2
• redmine_issue_templates 0.0.8
• redmine_wiki_extensions 0.6.5
• redmine_wiki_lists 0.0.4
• sidebar_hide 0.0.5
• traceability_matrix 0.2.3
• wiki_issue_fields 0.4.3

Context :

• I am trying to import a list of issues in order to update them.
• This issues already exist in database, and some of them have children
• The tracker type of parent issues is different of the tracker type of children issues (lets say parents issues are "feature" and children are "defect")
  • I am only importing (thus updating) the parents. Not the childern

Behavior :

• Issues that have no children are properly imported, and updated.
• When the first issue that have a children is meet, it causes a failure that stops the importing process.

Result and Logs :

• The result web page shows an "Internal Error" message
• The log file shows :

Completed 500 Internal Server Error in 568ms

NoMethodError (undefined method >' for nil:NilClass): app/models/issue.rb:159:increate_or_update'

• With my debbuging environment, I found that the failure appear in file _importercontroller.rb ligne 489 "unless issue.save"

Question is :

• is it a mis-use or mis-understanding of myself ?
• does your plugin need an update ?