Error occurs on starting ebook-viewer after setting CALIBRE_DEVELOP_FROM

[Jasonz]

Error occurs on starting ebook-viewer after setting CALIBRE_DEVELOP_FROM

Building icons.rcc
Traceback (most recent call last):
File "runpy.py", line 196, in _run_module_as_main
File "runpy.py", line 86, in _run_code
File "site.py", line 82, in <module>
File "site.py", line 77, in main
File "site.py", line 49, in run_entry_point
File "B:\Programs\calibre-6.5.0\src\calibre\debug.py", line 231, in main
ebook_viewer(['ebook-viewer'] + args[1:])
File "B:\Programs\calibre-6.5.0\src\calibre\gui_launch.py", line 101, in wrapper
return func(*a, **kw)
File "B:\Programs\calibre-6.5.0\src\calibre\gui_launch.py", line 114, in ebook_viewer
with register_with_default_programs():
File "B:\Programs\calibre-6.5.0\src\calibre\gui_launch.py", line 51, in register_with_default_programs
from calibre.gui2 import gprefs
File "B:\Programs\calibre-6.5.0\src\calibre\gui2\__init__.py", line 1562, in <module>
build_forms(os.environ['CALIBRE_DEVELOP_FROM'], check_for_migration=True)
File "B:\Programs\calibre-6.5.0\src\calibre\build_forms.py", line 92, in build_forms
ensure_icons_built(resource_dir, force_compile, info)
File "B:\Programs\calibre-6.5.0\src\calibre\build_forms.py", line 37, in ensure_icons_built
compile_icon_dir_as_themes(images_dir, icons)
File "B:\Programs\calibre-6.5.0\src\calibre\utils\rcc\__init__.py", line 59, in compile_icon_dir_as_themes
with tempfile.TemporaryDirectory(dir=path_to_dir) as tdir, open(os.path.join(tdir, 'icons.qrc'), 'w') as qrc:
File "tempfile.py", line 796, in __init__
File "tempfile.py", line 368, in mkdtemp
FileNotFoundError: [WinError 3] The system cannot find the path specified: 'B:\\Programs\\calibre-6.5.0\\src\\resourc
es\\images\\tmpo400faow'

[kovidgoyal]

You need to set CALIBRE_DEVELOP_FROM to the full path to the src sub-directory of the calibre source code.

[Jasonz]

Changing B:\Programs\calibre-6.5.0\src\ to B:\Programs\calibre-6.5.0\src is ok.