I have never tried to export such large amount of data. Maybe the export script is timing out [1] ? Check your system logs.

[1] http://php.net/manual/en/info.configuration.php#ini.max-execution-time

Hi
I'm going to increase max-execution-time, retest and provide feedback

Hi
I've added in csv_export.php

$execseconds='60000';
set_time_limit ($execseconds);

retested and seems everything is OK, thanks a lot.

My mistake I've supposed that => helper_begin_long_process(); will do the set.

I will continue test and provide more feedback

Oops I've done first test with a different filter (only 7000 bugs) with 20000 does not work.
I've added a log to write info to a file and all info seems to be there, I do not understand if issue is related to some limit in ob_start()
any hint ?

In old versions, CSV / Excel export is known to have linear memory growth, so with a big number of bugs, the script can end with error due to php memory limits (see 0020424)
This was fixed in v1.3.1, and then improved in later versions.
Time will always grow linearly with export size, but at least it will finish given enough time.

@cproensa
Thanks a lot, I'm going to test with 2.0.0 and provide feedback.

Thanks @fman
I am resolving this issue as it looks like a dupicate of a previous bug, which is already fixed.
If you find new issues, with a current mantis release, report it with updated info.

Hi
can confirm that issue is fixed on 2.0.0

thanks a lot