[Flow] Problem with routeParts

[Hüseyin Sandikli]

hello, 
i have an special probelm with the routes.yaml configuration. 
Here is the configuration:

  name: 'Customer'
  uriPattern: 'bla/{jhg}'
  defaults:
    '@subpackage': 'Administrator'
    '@controller': 'User'
    '@action': 'index'
  routeParts:
    jhg:
      objectType: '\Skriptura\EventPlaner\Domain\Model\User'

All works well without routeparts. if i delete routeparts and use the UUID like this : localhost/bla/UUID. it works well. 
if i add the routeparts..... i get an exception error like this: Fatal error: Exception thrown without a stack frame in Unknown on line 0.

I have alrdy add in the model a @Flow\Identity annotation.. why i get always this eexception ?