Hi,

There are a few big EIS fits files which are not easy to process by "eis_prep", for example:

20/eis_l0_20070820_170353.fits.gz    122M 
21/eis_l0_20070821_000022.fits.gz    118M 
21/eis_l0_20070821_133226.fits.gz    117M 
22/eis_l0_20070822_023009.fits.gz    116M 
23/eis_l0_20070823_191420.fits.gz    94M  
24/eis_l0_20070824_001531.fits.gz    92M  
24/eis_l0_20070824_105128.fits.gz    120M 
25/eis_l0_20070825_015152.fits.gz    99M  
25/eis_l0_20070825_050529.fits.gz    95M  
25/eis_l0_20070825_093750.fits.gz    89M  
26/eis_l0_20070826_005803.fits.gz    97M  
26/eis_l0_20070826_055213.fits.gz    92M  
27/eis_l0_20070827_045520.fits.gz    97M  
27/eis_l0_20070827_170835.fits.gz    81M  
27/eis_l0_20070827_210723.fits.gz    79M  
28/eis_l0_20070828_005937.fits.gz    72M  

These fits files are mostly generated by study "": doing full-ccd scan (often over 80 raster positions). 

The typical error message is:
"unable to allocate memory to make array"

However, the machine that running "eis_prep" has 4GB memory, which is fairly big.

Is there any way to do 'eis_prep' with these big fits files?
Or do we need to suggest that normally do not use full-ccd scan with too many raster postions?

Regards,
JianSun