Forgot to mention that I am using plugin version 1.22 from github.

Any hints for me?

Which information should I provide to track this issue?
I am willing to help :-)

If I call "<webroot>/mantis/plugins/Reminder/scripts/bug_reminder_mail.php" in my browser I get:
"It is not allowed to run this script through the webserver."

So looking at code: /mantis/core/mobile_api.php on line 41 shows me:
$t_agent = strtolower( $_SERVER['HTTP_USER_AGENT'] );

When calling it with php command line there is no value for "HTTP_USER_AGENT".

So above message makes sense.

Just a note to my issue.

Has anybody working due notifications with Reminder plugin and mantis 1.2.19 up and running?

Change mobile_api.php from

function mobile_is_mobile_browser() {
// If api call rather than browser then return false.
if ( strstr( $_SERVER['SCRIPT_NAME'], '/api/' ) !== false ) {
return false;
}

to (add 3 lines)
function mobile_is_mobile_browser() {
{
if ( !isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
return false;
}
// If api call rather than browser then return false.
if ( strstr( $_SERVER['SCRIPT_NAME'], '/api/' ) !== false ) {
return false;
}

Regression introduced by 0013740
Fixed in 1.3.x, see 0017186

Better splitted my issue into two:

Sending of emails is working in the meantime. Looks like a php install issue?

Regarding cron warning:
Just added your lines to my mantis installation and cron is quiet now.
Thank you for helping out.

Will this be backported to 1.2.x series as well?

Will this be backported to 1.2.x series as well?
Maybe, at least I opened an issue for it, see 0019837.

From my side you can close this issue.
We disabled plugin because of 0019848