I can't set BaseConcept for 'extends'

Hello,

Performing tutorial i'm stop on step:

"A new, unnamed concept is created in the editor panel. Click in the field

next to 'concept declaration' and give the concept the name HelloWorld. In

the 'extends' field, make the concept inherit from the BaseConcept concept

pressing Ctrl + Space and selecting BaseConcept from the list (there is only

one item in the list). This is a simple example of code-completion. Use the

same technique to change the 'is root' field from false to true."

Ctrl+space is work fine, i select BaseConcept but it disapear then focus

changed.

Thanks!

--

Alexey Efimov, Java Developer

Tops BI