how is it possible

[AK]

This happening with me 3 rd time on this hp box . When I do ls -alt I can see a file in current directory but when I try to open it (vi/cat ) it says no such file or directory .  I am same user who created the file . ( no permission problem )   Any idea ??   -ak           /home/ak/myscripts/shell_scr $ ls -alt total 4 drwxrwxrwx   2 ak       dba             96 Oct 23 14:40 . -rwxrwxrwx   1 ak       dba            412 Oct 23 14:40 mon_scr drwxr-x---  10 ak       dba           1024 Oct 13 16:07 ..  /home/ak/myscripts/shell_scr $ cat mon_scr cat: Cannot open mon_scr: No such file or directory  /home/ak/myscripts/shell_scr $ cat ./mon_scr cat: Cannot open ./mon_scr: No such file or directory /home/ak/myscripts/shell_scr $ /home/ak/shell_scr $ whoami ak