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PO"Member not found." error using win32com
 

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  1. PO"Member not found." error using win32com
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    <p>I'm having issues accessing a COM object using the Python win32com module, which I don't have when using VBA. See usage/error below. The other parts of the object are functioning OK, but I can't get any of the parameters out of the ResultSet object.</p> <pre><code>&gt;&gt;&gt; import win32com.client &gt;&gt;&gt; Aquator = win32com.client.gencache.EnsureDispatch("Aquator.Application") &gt;&gt;&gt; db = Aquator.LoadDatabase(r"D:\Shared", "AquatorExcel.mdb") &gt;&gt;&gt; project = Aquator.LoadProject(db, "A simple model", False, False) &gt;&gt;&gt; &gt;&gt;&gt; project.ModelRunStart() &lt;win32com.gen_py.Aquator Water Resource Simulation._ModelRun instance at 0x15264 824&gt; &gt;&gt;&gt; Aquator.ActiveProject.ModelRuns.Count 1 &gt;&gt;&gt; Aquator.ActiveProject.ModelRuns.Item(1).ResultSet &lt;win32com.gen_py.Aquator Water Resource Simulation._IResultSet instance at 0x149 19000&gt; &gt;&gt;&gt; Aquator.ActiveProject.ModelRuns.Item(1).ResultSet.Cost Traceback (most recent call last): File "&lt;stdin&gt;", line 1, in &lt;module&gt; File "C:\Program Files\Pythonxy\Pythonxy 2.7\Python27\lib\site-packages\win32c om\client\__init__.py", line 463, in __getattr__ return self._ApplyTypes_(*args) File "C:\Program Files\Pythonxy\Pythonxy 2.7\Python27\lib\site-packages\win32c om\client\__init__.py", line 456, in _ApplyTypes_ self._oleobj_.InvokeTypes(dispid, 0, wFlags, retType, argTypes, *args), pywintypes.com_error: (-2147352573, 'Member not found.', None, None) </code></pre> <p>The equivalent code in the VBA editor within the application functions correctly, returning a float:</p> <pre><code>Public Sub Test() MsgBox Aquator.ActiveProject.ModelRuns.Item(1).ResultSet.Cost End Sub </code></pre> <p>As far as I can tell, the EnsureDispatch command has done it's job correctly, and recognises the property (along with others, also inaccessible):</p> <pre><code>&gt;&gt;&gt; Aquator.ActiveProject.ModelRuns.Item(1).ResultSet._prop_map_get_.keys() ['WaterBalanceMl', 'RunDate', 'Parameters', 'DoublePrecision', 'WarningCount', ' FinishDate', 'AmountLost', 'SinglePrecision', 'Status', 'StartDate', 'Descriptio n', 'AmountLeaked', 'FailureCount', 'AmountAdded', 'ErrorCount', 'AmountStored', 'Name', 'WaterBalancePercent', 'InfoValueList', 'Results', 'States', 'Cost', 'A mountRemoved', 'Sequences', 'Duration', 'InfoNameList', 'RunTime'] &gt;&gt;&gt; Aquator.ActiveProject.ModelRuns.Item(1).ResultSet.meh Traceback (most recent call last): File "&lt;stdin&gt;", line 1, in &lt;module&gt; File "C:\Program Files\Pythonxy\Pythonxy 2.7\Python27\lib\site-packages\win32c om\client\__init__.py", line 462, in __getattr__ raise AttributeError("'%s' object has no attribute '%s'" % (repr(self), attr )) AttributeError: '&lt;win32com.gen_py.Aquator Water Resource Simulation._IResultSet instance at 0x15175888&gt;' object has no attribute 'meh' </code></pre> <p>I have tried using .GetCost() (a la <a href="https://stackoverflow.com/questions/7089496/setting-a-property-using-win32com">Setting a property using win32com</a>), to no avail ("object has no attribute...").</p> <p>What am I doing wrong here?</p>
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