This is pdfeTeX, Version 3.141592-1.21a-2.2 (Web2C 7.5.4) (format=latex 2009.7.9)  31 MAR 2010 14:26
entering extended mode
**\includepackage{cernart.cls}
! Emergency stop.
<*> \includepackage{cernart.cls}
                                
*** (job aborted, no legal \end found)

 
Here is how much of TeX's memory you used:
 2 strings out of 94501
 90 string characters out of 1176790
 48348 words of memory out of 1000000
 3273 multiletter control sequences out of 10000+50000
 3640 words of font info for 14 fonts, out of 500000 for 2000
 580 hyphenation exceptions out of 1000
 4i,0n,4p,32b,16s stack positions out of 1500i,500n,5000p,200000b,5000s
No pages of output.