Maps generated by CCP4 are CNS-formatted and they are
> not accepted with Discovery Studio (DS) and Maestro. > DS and Maestro use only CNX-generated maps.
There's your problem. CCP4 application do not generate CNS-formatted maps, they generate CCP4-formatted maps. The two formats are completely different.
Don't let the filename fool you - both CNS and CCP4 formatted maps commonly use the '.map' extension. However, to tell them apart you need to read the file contents. CCP4 map files have the magic string 'MAP ' located at bytes 208-211 (0xd0-0xd3).
The CCP4 map format is documented here: http://www.ccp4.ac.uk/html/maplib.html
