Demandware - Pipeline not found for current domain

I already made pipeline. Which is working fine. Suddenly it give error like

2015-12-18 02:39:08.091 GMT] ERROR system.core ISH-CORE-2368 Sites-SiteGenesis-Site core Storefront [uuid] [request-id]-0-00 [timestamp]

"Error executing pipeline: Hello com.demandware.beehive.core.capi.pipeline.PipelineExecutionException:

Pipeline not found (Hello) for current domain (Sites-SiteGenesis-Site)"

Does anybody know how to solve this?

In the event that your pipeline can not be found for the selected domain, please go trough and verify all of the following:

1. Double check Pipeline-Node naming

Pipeline URLs are generated by their name and your desired entry node, in this scenario, I would expect a file named Hello.xml in you cartridge's pipeline directory, and a start node named Start, would be accessed via {instanceURL}/on/demandware.store/Sites-mySite-Site/Hello-Start

2. Try and force upload of your cartridges

Occasionally the files on the server will not be updated correctly when a save is made; to force an update, right click your project, click Demandware > Upload Cartridges

3. Check your Cartridge Path

If you are using a shared instance, or your instance is re-provisioned, you may need to check your cartridge path to be sure your custom cartridge(s) are still there.

4. Check your Code Versions

Occasionally you may increment / change your code version - if you do, make sure that the path you select in Studio is the one that you have selected in Business Manager.

5. Tech Support

Should you still have issues following the four steps above, please file a support ticket and the tech-support team will be able to provide you with more assistance.