Unable to lookup System 'abcdev'

My previous problem of not getting the <b>preview</b> of WebDynpro iView is solved.

WebDynpro iViews in EP ?:|

now i am able to see the preview (Webdynpro iView)

correctly.But only when clicked on preview.

When i assign the view to page and page to workset and then when i login using the assigned user and click on the page it's displaying view but with a <b>portal runtime error</b>.

<b>Unable to lookup System 'abcdev'. Please check the system object and the alias...</b>

How is this possible?as it didn't throw in <b>preview</b>

Ruby