Error: dbop_next failed

Hello,

  The following took several (over 6) hours and ended in an error message:

      wc -l alist
      907 alist

      gtags  -f alist g
      htags -snohI -d g -t aig_dev g
      global: dbop_next failed.
      htags: 'c:\opt\global\bin\global.exe -xs --nofilter=path ".*"' failed.

  Output of "du -sk" command in g/ and in g/HTML/:

      84      GPATH
      548     GRTAGS
      2812    GSYMS
      468     GTAGS
      33848   HTML
                      4792    D
                      4       defines
                      4       files
                      4       help.html
                      4       I
                      4       icons
                      4       J
                      6644    R
                      4       S
                      22380   Y

  --Suresh