Setting application icon

[GREYON]

How are you everyone ,I have been try to set icon for my application by following what is the qt documentation but am having the error what can the problem and its solution ?below is my code and the error.

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    mainwindow.h

FORMS += \
    mainwindow.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target


RESOURCES += \
    RISOSI.qrc

RC_ICONS = school(1)(1).ico

( image url)

[JonB]

@GREYON
Hi. I don't think what you show in the .pro file will tell us/you what the issue is. (Except that [to me] school(1)(1).ico is a rather odd name with the parentheses in it, but that may not be relevant.)

If that message with a filename followed by Error 1 is make reporting the Linux errno upon trying to access (presumably write to) debug/APPCON_resource_res.o, that would be an EPERM "Operation not permitted" error. If that file exists, are you able to overwrite/delete it? If it does not exist, are you able to create it (e.g. with touch)? Try deleting all the files in debug/ are rebuild from scratch?

[GREYON]

@JonB thanks for replying, sorry am not very clear,which file can I delete and create from scratch?Do you mean the whole project or a**.ico** file?

[JonB]

@GREYON
? The file in the error message and that I quoted to you, I cannot see how it could be any clearer....

[GREYON]

@JonB thanks ,the problem was the icon file name,it has worked now thanks for your help