Error: AWStats database directory defined in config file by 'DirData' parameter (E:\grp\htm\transgarp\cgi-bin\datatest) does not exist or is not writable.

Setup ('E:\GRP\HTM\Transgarp\cgi-bin/awstats.sx.conf' file, web server or permissions) may be wrong.
Check config file, permissions and AWStats documentation (in 'docs' directory).