Narrative:

At the above location controller advised I was entering airspace B, even allowing for slant error, at 6.5 DME although close to B airspace, I believe I was still outside of it.

Google
 

Original NASA ASRS Text

Title: A GA PA28-200 PLT IS ADVISED THAT HE WAS ENTERING CLASS B AIRSPACE.

Narrative: AT THE ABOVE LOCATION CTLR ADVISED I WAS ENTERING AIRSPACE B, EVEN ALLOWING FOR SLANT ERROR, AT 6.5 DME ALTHOUGH CLOSE TO B AIRSPACE, I BELIEVE I WAS STILL OUTSIDE OF IT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.