Importing workitems fails null value, workaround, can't handle all linktype fields

I am using 3.0.1.3 (I know, I know)
and have exported the 7,000 workitems I need to import into another server.
I have exported/imported the project template and created the new project from that structure,
so I know the workitem layout is identical.
I am copying all fields and links. this has been exported, and the iteration uses the internal id vs the string text.
on import about 3/4 of the way thru we get a crash, with the only explanation of 'null value'..
with all the comments, the csv file is pretty large (200k 'lines') and weirdly shaped. (npt all the workitems are symmetrical)
is there any way to debug where the issue is? I need to get this done.. it works fine without the comments and links data of course..
Comments
sam detweiler
Jan 13 '14, 2:24 p.m.Ok, 1 workitem, with all links exported (has many children, found in build, )
Andy Jewell
Jan 13 '14, 2:39 p.m.Have you tried importing the first 2/3s then cutting up the next imports into smaller chunks? Theory here being that maybe the null is related to parsing a particular row. If you can successfully import as much as you can (on both sides of the hypothetical bad row), then maybe you can find the root cause.
sam detweiler
Jan 13 '14, 2:50 p.m.removing the links from the export makes the import possible.