Project's Library Cache. What is its purpose?

[Rene_Poschl]

@pauls969

What’s the point of the cache. If external library changes affect the schematics components. I haven’t done it but i’m sure if I rename my custom library to xyz library all schematics will be broken. As it happens with renamed or deleted components.

Thats exactly what the chache library is for. If the library changes, the original symbol is still in this chache library. (This library has the same purpose as the header of the pcb_new file.)

@pauls969

2-I’ve opened a couple of old schematics and parts rescue wants to update due to original custom library partno longer existing or having been renamed. It’s in the cache though? Yet the schematic loads with no part.

Rescue is i think the wrong name. If the symbol rescue dialog comes up, deselect the symbols you want to keep unchanged. Everything that is selected to be rescued is updated with the current library symbol. Everything that is not selected will stay as is.

@pauls969

3-What’s going to happen a few years from now when parts are removed for obsolete or library changes. All schematicswill have to be redone. Will I have to keep a backup version of all Kicad library versions used.

Again: This old parts are in the chache library. As long as you do not delete this file you will be fine.