can't open project after creating it

I am creating a project from a template (via 
DataObject.createFromTemplate(DataFolder, String)).  After I create it, 
I immediately attempt to open it with 
ProjectManager.getDefault().open(ProjectDescriptor).  This triggers the 
exception below.  I am able to open the project interactively using the 
explorer.

How do I programmatically open the project after creating it?

Tim

java.io.IOException: Can't read the project ID.
	at org.netbeans.api.projects.Project.projectInternalInit(Project.java:174)
	at org.netbeans.api.projects.Project.<init>(Project.java:147)
	at org.netbeans.api.projects.ProjectManager.open(ProjectManager.java:216)
	at org.netbeans.api.projects.ProjectManager.open(ProjectManager.java:92)
	at 
com.sun.tools.j2ee.migration.util.JavaPackageRoot.computePackageRoots(JavaPackageRoot.java:43)
[catch] ... 8 more