Python / Visum Error Message

[stephen flacke]

Hi, if anyone can help me unscramble this exception report from Python I'd be hugely grateful. All I'm trying to do is carry out is call VISUM and carry a flow bundle. I think the problem may be with the Python installation rather than the script.

Many thanks,

Stephen

I've got the following code:

import VisumPy.helpers
#from VisumPy.helpers import CreateVisum
 
Visum = VisumPy.helpers.CreateVisum(115)
fileNames = ["Base06_AM_DS"]
 
for fileName in fileNames: 
    Visum.LoadVersion(r"Y:/07 Forecasting/10 Review of Highway Model/Test/" + fileName)
 
#flow bundle execute and save matrix
 
fn = 119545498
tn = 119545499
 
# UC1
dseg = "UC1"
filename = "Y:/07 Forecasting/10 Review of Highway Model/Test/AA16DS_AM_SLA1_NB_UC1_F.mtx"
netElem = Visum.CreateNetElements()
link = Visum.Net.Links.ItemByKey(fn, tn)
netElem.add(link)
fb = Visum.Net.DemandSegments.ItemByKey(dseg).FlowBundle
fb.Execute(netElem)
fb.Save(filename,"O") 
 
#   Visum.Procedures.Execute()
Visum.SaveVersion(r"Y:/07 Forecasting/10 Review of Highway Model/Test/" + fileName) 

------------------------------------------

And then this is the error message I get:

File "C:\Python25\Lib\site-packages\Pythonwin\pywin\framework\scriptutils.py" , line 309, in RunScript
debugger.run(codeObject, __main__.__dict__, start_stepping=0)
File "C:\Python25\Lib\site-packages\Pythonwin\pywin\debugger\__init__.py", line 60, in run
_GetCurrentDebugger().run(cmd, globals,locals, start_stepping)
File "C:\Python25\Lib\site-packages\Pythonwin\pywin\debugger\debugger.py", line 624, in run
exec cmd in globals, locals
File "Y:\07 Forecasting\10 Review of Highway Model\Test\Oa_Original_SLA.py", line 21, in <module>
netElem.add(link)
File "C:\Python25\lib\site-packages\win32com\client\__init__.py", line 454, in __getattr__
raise AttributeError, "'%s' object has no attribute '%s'" % (repr(self), attr)
AttributeError: '<win32com.gen_py.Visum Object Library 11.5.INetElements instance at 0x22624096>' object has no attribute 'add'
>>>

[Smygis]

I can't find documentation on this module so im not sure whats going on. (PTV.de? my german is not good enough to figure out if the site is relevant)

What you could do is open up a python window and run the program line by line until you get to

netElem = Visum.CreateNetElements()

And then run:

dir(netElem)

And see what happens. The error seems to be about it not having a .add(), and i suppose if it looks strange that module might be corrupt or something.