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Thread: System Error when running loadUi()

  1. #1
    Join Date
    Feb 2011
    Posts
    5
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    Question System Error when running loadUi()

    Hello,
    I'm pretty new to Qt, Python and their combinations. I'm currently writing a QGIS plugin in python (I used QtCreator 2.1 (Qt Designer 4.7) to generate a .ui-file and am now trying to use it for a Quantum GIS plugin that's written in Python 2.5 (and running in the Quantum GIS Python 2.5 console)).
    I am running into trouble when loading the ui-file dynamically when the program runs the loadUi() function. The error occurs outside my script. Does that mean, I'm passing something wrong into it? Where does the error come in? Any hints on what could be wrong?
    Qt Code:
    1. # Set up the user interface from Designer
    2. code_dir = os.path.dirname(os.path.abspath(__file__))
    3. self.ui = loadUi(os.path.join(code_dir, "Ui_myfile.ui"), self)
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    Traceback (most recent call last):
    File "C:/Dokumente und Einstellungen/name.name/.qgis/python/plugins\myfile\myfile_plugin.py", line 57, in run
    self.dialog = myfileUI(self.iface)
    File "C:/Dokumente und Einstellungen/name.name/.qgis/python/plugins\myfile\myfile_gui.py", line 42, in __init__
    self.ui = loadUi(os.path.join(code_dir, "Ui_myfile.ui"), self)
    File "C:\PROGRA~1\QUANTU~1\apps\Python25\lib\site-packages\PyQt4\uic\__init__.py", line 112, in loadUi
    return DynamicUILoader().loadUi(uifile, baseinstance)
    File "C:\PROGRA~1\QUANTU~1\apps\Python25\lib\site-packages\PyQt4\uic\Loader\loader.py", line 21, in loadUi
    return self.parse(filename)
    File "C:\PROGRA~1\QUANTU~1\apps\Python25\lib\site-packages\PyQt4\uic\uiparser.py", line 768, in parse
    actor(elem)
    File "C:\PROGRA~1\QUANTU~1\apps\Python25\lib\site-packages\PyQt4\uic\uiparser.py", line 616, in createUserInterface
    self.traverseWidgetTree(elem)
    File "C:\PROGRA~1\QUANTU~1\apps\Python25\lib\site-packages\PyQt4\uic\uiparser.py", line 594, in traverseWidgetTree
    handler(self, child)
    File "C:\PROGRA~1\QUANTU~1\apps\Python25\lib\site-packages\PyQt4\uic\uiparser.py", line 233, in createWidget
    topwidget.setCentralWidget(widget)
    SystemError: error return without exception set
    Last edited by Amelie; 9th March 2011 at 16:30.

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