fileattribute of '288'

hi,  i found file attribute in pfc_n_cst_filesrv with the following value

1, 32 . 33 or 128.

we have function using of_dirlist to get pdf files from directory and check if older than 3 hours then delete.

however the function only return todays files.  when debugging I found the file attribute = 288, if I include this value

in the code then system return all old files as well.

However I don't know what it  means (so I can't include the value in the pfc).  I searched everywhere but can't find any infor,

get same value for both pb8 and pb12.5

thanks