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  • _bioinformatics/widgets/OWPIPA.py

    r1726 r1748  
    554554 
    555555    def UpdateExperimentTypes(self): 
    556         self.signalManager.freeze(self).push() #setFreeze(1) 
     556        if self.signalManager: 
     557            self.signalManager.freeze(self).push() 
    557558        try: 
    558559            self.expressionTypesCB.clear() 
     
    562563            pass 
    563564        finally: 
    564             self.signalManager.freeze(self).pop() #setFreeze(0) 
     565            if self.signalManager: 
     566                self.signalManager.freeze(self).pop() 
     567 
    565568        self.ctypei = max(0, min(self.ctypei, len(self.exTypes)-1)) 
    566569 
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