Adding existing projects from "examples"

[AnneRanch]

Adding existing projects from "examples" I am getting this error.
What is "proper QT build " ?
Did I added wrong file from github?

This is what I have in main project .pro

SUBDIRS +=
../../../../../media/w/BACKUP/PROGRAM_DEV/QT/CAT_COPY/CAT_FT857/SUB_MDI
../../../../../media/w/BACKUP1/PROGRAM_DEV/QT/CAT_NO_BT/CAT_FT857/SUB_MDI \

../../SOURCE/qtconnectivity/examples/bluetooth/btscanner.pro \

../../SOURCE/qtconnectivity/examples/bluetooth/btscanner \
SUB_PROJECT_MAIN

Neither btscanner file is acceptable.

:-1: error: Project ERROR: You cannot build examples inside the Qt source tree, except as part of a proper Qt build.

For test verification I have added another existing project - no issue

SUBDIRS +=
../../../../../media/w/BACKUP/PROGRAM_DEV/QT/CAT_COPY/CAT_FT857/SUB_MDI
../../../../../media/w/BACKUP1/PROGRAM_DEV/QT/CAT_NO_BT/CAT_FT857/SUB_MDI \

../../SOURCE/qtconnectivity/examples/bluetooth/btscanner.pro \

../../SOURCE/qtconnectivity/examples/bluetooth/btscanner \

../SUBPROJECTuntitled.pro \
SUB_PROJECT_MAIN

[jsulm]

@AnneRanch said in Adding existing projects from "examples":

../../SOURCE/qtconnectivity/examples/bluetooth/btscanner.pro

Why do you have pro file in SUBDIRS list?