Send receive errors

Hello,

I use snapshots as backups, and send them to other locations with a parent. It's very hit or miss if any one of them will actual work.

An example of the latest error:

ERROR: rmdir usr/lib/modules/4.3.3.201512282134-1-grsec/build/.tmp_versions failed: No such file or directory

Typically using an earlier snapshot as the parent will work.

Does anyone have any tips on how to make them more reliable?