>What is really odd about it is that a couple of times, I got valid return values, but otherwise, I get the error that you do. I noticed however that if you run it a bunch of times successively, the error changes in the line position. In other words, where it reports lineposition 293, it will also report anything from lineposition 291 through 303. I haven't found the flaw, but it just struck me as strange that the line position of the illegal xml character keeps changing. Also, that position seems to be in the 'definitions' line created by the compiler itself.
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Alan,

Thanks for the feedback. I just noticed that, the line position thing, myself.

I've run it a number of times in succession from the .NET IDE but never have seen the error, even when I first created the routine.

I noted in some of my previous work with Web Services from VFP, that rather than "localhost", I used the actual machine name. I tried that and got the same error.