ack no class compile error

Anyone ever seen this? I usually don't do stuff on the Mac, and this one is new on me. Downloaded latest from SVN, have done fresh installs of Max itself several times, etc.

Import maxgui.drivers

results in this:

Building untitled1
Compiling:untitled1.bmx
Linking:untitled1.debug
Executing:untitled1.debug
2008-08-29 19:57:23.847 untitled1.debug[65140:717] ack no class
2008-08-29 19:57:23.848 untitled1.debug[65140:717] ack no class

Process complete

I don't know what it means, but it looks very odd.

[65140:717] indicates the 717th character of line 65140 in the source code. Can that be right?

'Ack no' is common Scottish parlance, I believe. Any of the BRL team from those parts?