Hello Daniel,
So close! The --p-where command needs a specific syntax and I bet that will fix your command.
There is a great example in this post, which is a great example:
--p-where "BodySite='gut' AND Year='2008' AND Subject='subject-1'"
For your data, it might look like this:
--p-where "[#SampleID]='ww1cDNA' OR [#SampleID]='ww2cDNA'"
EDIT: I've updated the command you could try on your data. Let me know how it works!
Colin