error in creating a new directory

[mahiapkum]

Hi all,
I have written a c program in which i try to create a directory using mkdir call but when i check the value of errno,sometimes it gives me 2(ENOENT) and 36(ENAMETOOLONG).what might be the the error.
this is the code:
i have given base path as /home/es/work/gsf/gulb/data/

sprintf(new_dir_path,"%s/%s_%08d_%d%02d%02d%02d%02d%02d/",base_path,file_tag,dir_counter,1900+now.tm_year, now.tm_mon+1,now.tm_mday,now.tm_hour,now.tm_min,now.tm_sec);
if(mkdir(new_dir_path,0777) < 0)
        {
            if(errno != EEXIST)
            {
                printf("Unable to create relative directory!! :%s,%d\n",new_dir_path,errno);
                return -1;
            }
        }