>I am using ADIR to get a specific number of files from a directory based on a criteria. So, ADIR(laFile,gcFat+'thread\*.*') will create an array and I can now use ALEN(laFile,1) to get the file count. However, on big directory this is causing a big array to be created just to get the number of files. How can I optimize that?

Michel,
As Nadya posted, ADir() oes return the number of rows in the array. But as you already sigthed, the array still gets built and this could a significant amount of time on large directories. It could also fail on very large directories because of the 65000 element limit of arrays.

You can use the old Sys(2000) function.

local lxx, lcfile
lxx = 0
lcfile = sys(2000,gcFat+'thread\*.*')
do while !(lcfile=='')
   lcfile = sys(2000,gcFat+'thread\*.*',1)
   lxx = lxx + 1
enddo

If you only need the count, this should give you what you want.

HTH.