I had one global variable, declared before main:

long double curValue[36];

But removing it still left me with the same problem. The only thing that I can think of is that there is something in MainWindowImpl.h which is causing this problem, since thats the only thing that comes before main, as far as I can tell. I'm posting it here, if you wouldnt mind looking through it and telling me if it could be causing problems.

Qt Code: 
  1. #ifndef MAINWINDOWIMPL_H
  2. #define MAINWINDOWIMPL_H
  3. //
  4. #include <QMainWindow>
  5. #include "ui_mainwindow.h"
  6. //
  7.  
  8.  
  9. class MainWindowImpl : public QMainWindow, public Ui::MainWindow
  10. {
  11. Q_OBJECT
  12. public:
  13. 	MainWindowImpl( QWidget * parent = 0, Qt::WFlags f = 0 );
  14. 	void refreshDisplay(int,long double curValue[36]);
  15. private:
  16.  
  17. 	bool bLatch;
  18. 	int maxValue[36];
  19. 	bool bCheckable[36][2];
  20. private slots:
  21. public slots:
  22. 	void bumpUp1();
  23. 	void bumpUpRETURN1();
  24. 	void bumpDn1();
  25. 	void bumpDnRETURN1();
  26. 	void linkLx1();
  27. 	void slideLx1(int);
  28.  
  29. 	void bumpUp2();
  30. 	void bumpUpRETURN2();
  31. 	void bumpDn2();
  32. 	void bumpDnRETURN2();
  33. 	void linkLx2();
  34. 	void slideLx2(int);
  35.  
  36. 	void bumpUp3();
  37. 	void bumpUpRETURN3();
  38. 	void bumpDn3();
  39. 	void bumpDnRETURN3();
  40. 	void linkLx3();
  41. 	void slideLx3(int);	
  42.  
  43. 	void bumpUp4();
  44. 	void bumpUpRETURN4();
  45. 	void bumpDn4();
  46. 	void bumpDnRETURN4();
  47. 	void linkLx4();
  48. 	void slideLx4(int);
  49.  
  50. 	void bumpUp5();
  51. 	void bumpUpRETURN5();
  52. 	void bumpDn5();
  53. 	void bumpDnRETURN5();
  54. 	void linkLx5();
  55. 	void slideLx5(int);	
  56.  
  57. 	void bumpUp6();
  58. 	void bumpUpRETURN6();
  59. 	void bumpDn6();
  60. 	void bumpDnRETURN6();
  61. 	void linkLx6();
  62. 	void slideLx6(int);	
  63.  
  64. 	void bumpUp7();
  65. 	void bumpUpRETURN7();
  66. 	void bumpDn7();
  67. 	void bumpDnRETURN7();
  68. 	void linkLx7();
  69. 	void slideLx7(int);	
  70.  
  71. 	void bumpUp8();
  72. 	void bumpUpRETURN8();
  73. 	void bumpDn8();
  74. 	void bumpDnRETURN8();
  75. 	void linkLx8();
  76. 	void slideLx8(int);
  77.  
  78. 	void pressGM();
  79. 	void slideGM(int);
  80. 	void checkLatch();
  81.  
  82. 	void options();
  83.  
  84. };
  85.  
  86. class linkSlide
  87. {
  88. 	private:
  89. 	void slideLink(int,int);
  90.  
  91. 	public:
  92. 	void slideFunct(int,int,int);
  93. 	void linkFunct(int);
  94. 	void slideGM(int);
  95. };
  96.  
  97. class BumpLatch
  98. {
  99.  
  100.   public:
  101. 	bool checkable;
  102. 	int bumpUp(int,int);
  103. 	int bumpUpRETURN(int);
  104. 	int bumpDn(int,int);
  105. 	int bumpDnRETURN(int);
  106. 	void latch(bool);
  107.  
  108. };
  109.  
  110.  
  111. #endif
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