Not sending recurring invoices

I have an issue that invoiceninja does not send the recurring invoices
cron output is like this:

Tue, 01 Jan 2019 23:00:05 +0000 Running SendRecurringInvoices…
Tue, 01 Jan 2019 23:00:05 +0000 31 recurring invoice(s) found
Tue, 01 Jan 2019 23:00:13 +0000 Processing Invoice: 286
Tue, 01 Jan 2019 23:00:14 +0000 Not billed - Sending Invoice

Sometimes an error like this shows up in the cron
In Filesystem.php line 61:

Allowed memory size of 33554432 bytes exhausted (tried to allocate 507904 b
ytes)

but i’ve got enough php mem ( http://hanspoelmans.be/ninja/public/phpinfo.php )

Invoices just remain as a concept.
manually emailing them trough the webgui works flawlesly

Not sure, maybe try increasing the memory limit further to see if it helps?

I think 2gig is more then enough. no?

Your PHP limit appears to be 1GB

It should be enough anyway but it’s worth trying 2

got 2gb allocated, didn’t save it last time
still got this msg last night

Thu, 03 Jan 2019 23:00:06 +0000 Running SendRecurringInvoices…
Thu, 03 Jan 2019 23:00:07 +0000 31 recurring invoice(s) found
Thu, 03 Jan 2019 23:00:13 +0000 Processing Invoice: 122
Thu, 03 Jan 2019 23:00:14 +0000 Not billed - Sending Invoice

In Filesystem.php line 61:

Allowed memory size of 33554432 bytes exhausted (tried to allocate 507904 bytes)

The allowed memory size error is the same, I think there is a limit restricting how much memory the script can use.