The small app I was creating works ‘perfect’ locally. A folder is scanned for images. The images are listed and a user then can give tags/description to the images. The updates are stored in a ‘yaml-file’ (for now). When deploying it on a server I get: [hit #10]request to POST /edit/0 crashed: write_file 'myImages.yml' - sysopen: Permission denied at... The code of the POST post '/edit/:id' => sub { my $data = get_AoH_imagelist(); my @data = @{$data}; my $id = param('id'); $data[$id]{tags} = params->{tags}; $data[$id]{description} = params->{description}; my $filename = "myImages.yml"; write_file $filename, to_yaml($data); redirect '/data'; }; Just thougth to change the permissions of the file but that didn't work. It has been a long journey. A RESTful service, login with encrypted password. This issue seems to be the last hurdle. Hope someone is able to hint me in a direction to solve this. Thanks, Gert