Silently fails when can't write output files

[kalj]

Describe the bug
If writing output fails, no error message is given and exit status is success (0).

To Reproduce
E.g., if the output file is in a non-existing directory, then this silent failure happens

Expected behavior
An error message, and failing exit status (non 0).

Real (buggy) behavior
No error message, appears to be successful, but no output files are created.

Additional context
Version 2.0.0, arch linux.