To all
A new problem appeared this week which is disconcerting.
We have a Biorad MRC-1000 and use Confocal Assistant 3.10 to
convert biorad .pic files to .tif files so that they can be used for
image manipulation on other computers. In the past few days some of
the converted .tif files will not open in Photoshop on  Macs (at
least 5 different Macs have been tried). The error message is -
"Could not open [file name] because an unexpected end-of-file was
encountered. -39" Not all files that are in the batches have this
problem, some do and some do not. Those that do not open on the Macs
open fine on the Biorad PC computer. Also none of my PC users have
this problem. If you try to convert the files a second time it
sometimes works, but usually does not.  If you look at the sizes of
the files that open vs. those that do not, the ones that do not open
are 10-20% smaller than the ones that do open. Since Zip disks are
the exchange and storage medium, we tried different Zip disks to no
avail. It seems that if some tag is missing on the files that do not
open, is there a fragmentation problem, is it a MacLink problem.
Any suggestions would be appreciated.
Thanks
Bruce Cutler
Director, Microscopy Lab
Univ. Kansas, Lawrence