Error using griddata v4

I get this error using griddata v4. What's the problem?

Error in griddata>gdatav4 (line 247)

d = abs(xy - xy.');

[Steven Lord]

That looks like only the last part of the error message. Please post all the text that appears in red when you try to run the code that throws this error. If possible please also post a small segment of code that causes the error to be thrown when you run it.