How to reproduce

Switching the read belt lenght on again after having it turned off

Work around

rebuilding the belt segment is a work around for this

The mod Read belt contents, hold (all belts), read belt length (1.0.6) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event read-belt-contents-hold-all-belts-read-belt-count::on_gui_checked_state_changed (ID 3)
The mod Read belt contents, hold (all belts), read belt length (1.0.6) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event read-belt-contents-hold-all-belts-read-belt-count::script_raised_built (ID 89)
...nts-hold-all-belts-read-belt-count__/scripts/helpers.lua:41: attempt to index local 'struct' (a nil value)
stack traceback:
...nts-hold-all-belts-read-belt-count__/scripts/helpers.lua:41: in function 'delete_struct'
...lt-contents-hold-all-belts-read-belt-count__/control.lua:199: in function <...lt-contents-hold-all-belts-read-belt-count__/control.lua:153>
stack traceback:
[C]: in function 'create_entity'
...lt-contents-hold-all-belts-read-belt-count__/control.lua:251: in function <...lt-contents-hold-all-belts-read-belt-count__/control.lua:241>