Thanks for the reply David.
on SmartOS.
Perhaps this is SmartOS specific.
[root@hyp-01 ~]# pkgin av|grep znapzend
znapzend-0.20.0nb4 ZFS send/receive backup system
[root@hyp-01 ~]# pkgin av|grep IOLoop
p5-Mojo-IOLoop-ForkCall-0.20nb4 Execute a code block asynchronously by forking
The latest znapzend is znapzend-0.21.1 on the GitHub page.
Output from znapzend:
[2022-08-25 16:53:27.42790] [7137] [info] found a valid backup plan for zones/2deb8da3-6535-65e7-fee8-a3cb7c509fe8/data...
Can't locate object method "delay" via package "Mojo::IOLoop" at /opt/tools/lib/perl5/vendor_perl/5.36.0/Mojo/IOLoop/ForkCall.pm line 27.