While holding a blueprint book, pressing Shift, and using the scroll wheel, blueprint align gave the following error:
Error while running event blueprint-align::blueprint-align__input__move-grid-right (ID 247)
Item is not blueprint.
stack traceback:
[C]: in function 'index'
__blueprint-align/control.lua:107: in function 'move_blueprint_grid'
blueprint-align/control.lua:209: in function <blueprint-align/control.lua:207>

Thanks for the report! Just to check: did you rebind the "move absolute grid" controls to use the scroll wheel instead of the arrow keys?

Left it as default, so no.

Huh, that's weird. Anyway, I'll take a look at it.

Might be related, when placing train tracks it is possible that i pressed shift+scroll.
just installed the mod, haven't used any of its features/changed settings.

The mod Blueprint aligner (1.1.0) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event blueprint-align::blueprint-align__input__move-grid-left (ID 242)
Item is not blueprint.
stack traceback:
[C]: in function 'index'
__blueprint-align/control.lua:107: in function 'move_blueprint_grid'
blueprint-align/control.lua:201: in function <blueprint-align/control.lua:199>

Fix for above crash ( could be limiting some functionality not used by me ) by disabling this lines

control.lua: https://i.imgur.com/vKBqnyt.png
data.lua: https://i.imgur.com/9uo7rNd.png

Now I can run and use blueprint planner.

Aligner is awesome time saver.

Sorry for the delay, should be fixed in version 1.2.0. Thanks for the report!