Cannot delete SmartObject generated from Endpoints WCF

Hi ZdeneKH

Thanks for posting you question on our community it is much appreciated

To answers your question on this topic

How to delete SmartObjects without existing service instance?

Currently there is no known manner to of deleting smartobject (Here is some possible guides that can help you to prevent deletion of SmartObject)

- I can suggest that you log a support ticket for this enhancement request with a K2 Support Engineer, so that this could be include in further release of K2.

SmartObject Services (Security & Service)

- http://help.k2.com/onlinehelp/k2blackpearl/userguide/4.7/default.htm#6.administer/workspace_legacy/mc_smartobjectservices.htm

SmartObject Terminology and Architecture

http://help.k2.com/onlinehelp/k2blackpearl/userguide/4.7/default.htm#servicebrokers/smartobjectterminology.htm

Service Instances

http://help.k2.com/onlinehelp/k2blackpearl/userguide/4.7/default.htm#k2_management_site/integration/serviceinstances.htm

Caution: Deleting a Service Instance and the SmartObjects that rely on that Service Instance may break existing applications. Do not delete a Service Instance unless you understand the impact of doing so. 

Hope the above helps

Regards