Error code -199999

When I call AddCampaigns with what appears to be valid and sensible soap XML data, I get the following error code:

-199999

at Index 0.

Has anyone encountered this before?

[176 byte] By [jlipps] at [2008-2-25]
# 1
I found in the docs that this is an "undefined SQL error". I assume this means an error on MSN's side. Anyone have any idea how to go about debugging this?
jlipps at 2007-9-4 > top of Msdn Tech,Windows Live Developer Forums,Microsoft adCenter: Development...

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