I am having trouble on a couple of systmes that were installed from a linuxcnc 2.5 live CD, upgraded to 2.6 and now 2.7. Both machines are 4 axis XYZW. When running 2.7 I am sometimes getting an alarm "Circular Move on Line N would exceed joint 8's negative limit." This last time the alarm occured for me running a file that had no W commands in the file. Switched back to 2.6 and it runs fine.
http://linuxcnc.org/index.php/english/forum/20-g-code/29589-g-code-error#63221
Sorry, I meant to post this in the 2.7 group but it ended up under Future-Release instead. Is there a way to move it to where it should be?
Fixed in v2.7.0-39-g1c5461c. Thanks for the bug report.