Take the 2-minute tour ×  I am working on a CNC (computer
numerical control) project which cuts shapes into metal with
help of laser.  Now my problem is once in a while (1-2 times in
20 odd days) the cutting goes wrong or not according to what is
set.  But this causes loss so the client is not very happy about
it.  I tried to find out the the cause of it by    1. Including
log files   2. Debugging   3. Repeating the same environment.
But it wont repeat.  A pause and continue operation will again
make it to run smoothly without the bug reappearing.  How do I
tackle this issue? Should I state it as a Hardware Problem?
share|improve this question Welcome to the wonderful world of
the heisenbug *8') –  Mark Booth Apr 3 '12 at 10:14 When you say
it happens 1 to 2 times in 20 days, does this mean that it takes
about 20 days for it to appear or it sometimes appears after day
1, sometimes day 3 etc... –  Dunk Apr 3 '12 at 18:57 @Dunk there
is no specific timing to it, but never appeared in a week twice
so far. –  S