CCL: Orca and float/double

 Sent to CCL by: Frank Neese [neese#,#thch.uni-bonn.de]
 
 I have yet another question with the ORCA input. I see no difference in
 the timing or output from compressed double and float calculations (I am
 working with 64 AMD machines).
 These are the first lines of my input:
 #Test a DFT calculation with cdouble
 ! RKS Quick-DFT cdouble
 *xyz 1 1
 #Test a DFT calculation with cfloat
 ! RKS Quick-DFT cfloat
 *xyz 1 1
 Is this the correct syntax (the program does not complain). I have also
 tried the alternative input:
 %SCF VALFORMAT COMPRESSION CFLOAT
 end
 But this gives an error.
 Thanks again for your help. I have tried to contact the orca team but
 they have not answered...
 Regards,
 Ramon
that is the correct result: in SCF calculation it does not matter since floats are never used (it would be deadly). 
 It is MP2 where you see the difference.
 Best regards,
 FN
PS: the syntax is not correct. You would have to use COMPRESSED and FLOAT as keywords in the simple input line and otherwise specifically assign the correct variables. 
 --
 ---------------------------------------------------------------
 Prof. Dr. Frank Neese
 Lehrstuhl fuer Theoretische Chemie
 Universitaet Bonn
 Wegelerstr. 12
 D-53115 Bonn, Germany
 neese(-)thch.uni-bonn.de
 Phone: +49-228-732351
 FAX: +49-(0)228-739064
 ---------------------------------------------------------------