python生成的表格打不开 python保存之后打不开

我有一个PythonExcelDocument类，它为读取/写入/格式化Excel文件提供了基本的方便方法，而且我在看似简单的Python代码中遇到了一个奇怪的错误。我有一个save andsaveAs方法：

def save(self):
''' Save the file '''
self.workbook.Save()
def saveAs(self, newFileName):
''' Save the file as a new file with a different name '''
self.workbook.SaveAs(newFileName)

save方法工作得很好，但是当我试图调用saveAs方法-myExcelObject.saveAs("C:/test.xlsx")时，会得到以下错误：

Traceback (most recent call last):
File "C:\workspace\Utilities\src\util\excel.py", line 201, in 
excel.saveAs("C:/test.xlx")
File "C:\workspace\Utilities\src\util\excel.py", line 185, in saveAs
self.workbook.SaveAs(newFileName)
File "", line 7, in SaveAs
pywintypes.com_error: (-2147352567, 'Exception occurred.', (0, u'Microsoft Office Excel', u"Microsoft Office Excel cannot access the file 'C:\\//8CBD2000'. There are several possible reasons:\n\n\u2022 The file name or path does not exist.\n\u2022 The file is being used by another program.\n\u2022 The workbook you are trying to save has the same name as a currently open workbook.", u'C:\\Program Files\\Microsoft Office\\Office12\\1033\\XLMAIN11.CHM', 0, -2146827284), None)

有人能解释发生了什么事吗？