Try one or more of the following:
Make sure that JSEclipse is installed.
JSEclipse requires a workspace folder name with no spaces. Make sure that your workspace folder name does not have spaces.
In the Eclipse software, click File > Switch Workspaces > Other.
In the Workspace field, type a path, or browse to a folder.
To copy your current workbench layout and working sets, expand Copy Settings, and then select the options.
Click OK.
The Eclipse software restarts and uses the new workspace.
In the Eclipse software, click LDD SDK > LDD Update JSEclipse Autocomplete.
When prompted, click Yes to restart the Eclipse software.
Make sure that the auto-complete libraries for JSEclipse have been updated for LDD.
In the Eclipse software, click LDD SDK > LDD Update JSEclipse Autocomplete.
When prompted, click Yes to restart the Eclipse software.