Troubles importing from Google Code

Tried YouTrack Hosted Beta today. First thing I wanted to do was to import issues from Google Code. Found documentation to be very sparse. Eventually I came up with this mapping file:

# mapping for default google code project

import googleCode

print "Use spockframework mapping scheme"

googleCode.STATES = {'New'  : 'Submitted',

          'Accepted' : 'Open',

          'Started'      : 'In Progress',

          'Fixed' : 'Fixed',

          'Duplicate'  : 'Duplicate',

          'CannotReproduce' : 'Can\'t Reproduce',

          'ToBeDiscussed' : 'To be Discussed',

          'WaitingForFeedback' : 'To be Discussed',

          'NotABug' : 'Won\'t Fix',

          'WontFix'    : 'Won\'t Fix',

          'Invalid' : 'Incomplete'}

googleCode.TYPES = {'Type-Defect'      : 'Bug',

         'Type-Feature'     : 'Feature',

         'Type-Task'        : 'Task',

         'Type-Enhancement' : 'Feature',

         'Type-Other' : 'Task'}

googleCode.PRIORITIES = {'Priority-Minor'    : '0',

           'Priority-Normal'   : '1',

           'Priority-Medium'   : '1',

           'Priority-Major'    : '2',

           'Priority-Critical' : '3'}

googleCode.CUSTOM_FIELDS = {

         'Milestone'   : {'name': 'Fix Version', 'type' : 'enum[1]', 'isPrivate': False, 'defaultVisibility': True, 'empty' : 'Unscheduled'},

         'Module'   : {'name': 'Area', 'type' : 'enum[1]', 'isPrivate': False, 'defaultVisibility': True, 'empty' : 'Uncategorized'}}

Not sure about the custom fields. Maybe Milestone and Module should be mapped to what appear to be the corresponding builtin YouTrack fields ('Fix versions' and Subsystem), but I don't know if that's supported.

Import proceeded for a while but reported many errors, most of which appear to be related to custom fields. For example:

Create custom fields

Error for [/admin/customfield/field/Area?isPrivate=False&typeName=enum%5B1%5D&defaultVisibility=True]: 404: Not Found: Custom field type [ null ] not found.

Error for [/admin/project/spock/customfield/Area?emptyFieldText=Uncategorized&bundle=Area]: 404: Not Found: Project [ Area ] not found.

Error for [/admin/customfield/field/Fix%20Version?isPrivate=False&typeName=enum%5B1%5D&defaultVisibility=True]: 404: Not Found: Custom field type [ null ] not found.

Error for [/admin/project/spock/customfield/Fix%20Version?emptyFieldText=Unscheduled&bundle=Fix+Version]: 404: Not Found: Project [ Fix Version ] not found.

And later:

<?xml version="1.0" ?><importReport>...<item id="111" imported="false"><error fieldName="Area">Field is unknown</error><error fieldName="Fix Version">Field is unknown</error>...

And later:

Add tags to imported issues

For issue [103] add tags ['Type-NewFeature']

Error for [/issue/spock-103/execute?command=tag+Type-NewFeature]: 404: Not Found: Issue not found.

Eventually the import failed in the 'transfer attachments' phase:

Transfer attachments

Get issues from 1 to 101

Process issue [1]

Process issue [2]

...

Process issue [55]

  Transfer attachment [VarargsMatchingTest.groovy]

Traceback (most recent call last):

  File "googlecode2youtrack.py", line 331, in <module>

    main()

  File "googlecode2youtrack.py", line 49, in main

    googlecode2youtrack(source_login, source_password, target_url, target_login, target_password, projectName, projectId)

  File "googlecode2youtrack.py", line 317, in googlecode2youtrack

    group=None)

  File "/swd/app/youtrack-remote-api/python/youtrack/connection.py", line 134, in createAttachment

    raise e

urllib2.HTTPError: HTTP Error 404: Not Found

After the import, lots of users had been created in YouTrack, but only two issues. Any pointers on how to improve on this? Definitely needs better documentation.