[daip] AIPS on MacBook Pro

[Eric Greisen]

I can see two things from what you sent - the first is that it did the
same thing every time.  That should mean that we are not looking at a
hardware error or a timing issue in the OS.

But, the second thing I saw was a Clean that was more or less normal
for a while, which then hit the noise level.  After that the CCs found
wandered around going well up from the minimum, back down, up again,
down again until a really serious run away occurred and the components
became 50 times the minimum and only then did CLEAN object.  That
objection arises within the minor cycles when the next component is
seriously larger than the previous.

Now, the Clean should behave the same more or less on different
computers, but it will not be exactly the same except on two computers
of identical hardware (not your case).  I think that you are
attempting to Clean way too deeply and something bad is happening.  Do
you watch these Cleans on the TV?  Does it develop dark spots and
bright spots as it goes or what seems to happen?  Have you done the
same Clean to say 1000 iterations on your two computers and then
compared the output images digitally?  They will not be identical but
the CC files should be the same for a while and the images should be
even closer than the CCs.

I cannot think of something causal with a security update that would
affect IMAGR.EXE in a subtle way and I know that IMAGR seems to be
behaving normally.  I can re-test it on my Intel Mac to make sure.

Eric Greisen