eeschema: Error occured when open hierarchical schematic

Please attach the project to this bug report. I have a deeply nested test project and I have no issues so I need to see your subfolder structure and the file paths in your sheet definitions to reproduce the bug.

Hello! I attached my project. Please check.
Also I tryed latest version of KiCAD:
http://downloads.kicad-pcb.org/windows/nightly/kicad-r9433.ac9fc949b-x86_64.exe
Bug also is present in this version.

Fixed in revision b8c00a0d072cde10abc759df5fb0bffbbdc77d0b
https://git.launchpad.net/kicad/patch/?id=b8c00a0d072cde10abc759df5fb0bffbbdc77d0b

@Denis, thank you for the sample project so I could test this. It was immediately obvious what the issue was. There are two issues at play here. One is with kicad which I have already fixed. The other is with how you have defined nested sheets in your schematic. For example, in the root sheet you have a sheet named "DI16" which references schematic "building-blocks/DI16.sch". Once you enter that sheet, all subsequent sheet file paths are relative (assuming you used a relative path in the sheet file name) to the project path plus "/building-blocks". Inside sheet "DT16" you have 16 sub-sheets all referencing the same sheet file "building-blocks/Digital_Input_Iosl.sch". The problem is that they all are already referencing the "/building-blocks" path". When this gets appended to "project/path/building-blocks", the final path will end up being "project/path/building-blocks/building-blocks" which is wrong. For all nested sheets in a sheet that already references the "/building-blocks" path, you should not include another schematic file sub-path because the path hierarchy already references this path. The easiest way to think of it is to think about is is like walking up and down a directory tree. If this worked in the past, it was by shear dumb luck. I suppose I'm going to have to face the music for this when version 5 is released.

Hello Wayne!
I understood my mistake. The sheets in the "building-blocks" folder should not have in their path a folder "building-blocks". It is obvious.
Such paths were left for the reason that I copied the "DI16.sch" file from the project root folder to the "building-blocks" folder. And it worked until a certain moment...
Thanks for the fix and for pointing out my mistake! :)

Hi Dennis,

You are welcome. Thank you for providing a sample project to test. This is more helpful than most users realize and it allowed me to immediately identify the issue. Anything that cuts down on the amount of time to fix bugs is a good thing. I do need to document the hierarchical path behavior so users will understand how this works and it's on my todo list. Thank you for using KiCad.

Cheers,

Wayne