Since you've had successful "runs", I wonder if it's a memory issue.  You could increase your partition size or

Set $zstorage=$zstorage*10  // temporarily increase partition size

And see if that helps (ie changes the number of lines processed)

What about 

w $system.TCPDevice.LocalAddr()?

Typically custom code that needs to be shared across all Namespaces would be put into a %Z based item.  You should be able to use something like %ZMy.DeepSee.Component.datePick keeping all your extension code organized into %ZMy, though you could just do %ZDeepSee.Component.datePick