win32com problem: more than one instance
Thomas Rademacher
I start my script convert.py simultaneously in any dos-shells several
times. But I get every time the same solidworks instance.
I see in the proccess (task) manager only one solidworks.exe
Therefore I get for all simultaneous conversions the same output file.
I tested the same code with excel (test_excel.py) and her I get many
instances of excel in proccess (task) manager.
How can I get many instances of solidworks?
Is it a problem of python?
Or is it a problem of the Solidworks-COM-Implemention and I get the
same problem with an C++ client implementation?
Thanks for your help, Thomas
convert.py
import pythoncom
pythoncom.CoInitializeEx(pythoncom.COINIT_MULTITHREADED)
sldworks = gencache.EnsureModule('{83A33D31-27C5-11CE-
BFD4-00400513BB57}', 0x0, 13, 0)
sw = sldworks.ISldWorks(DispatchEx('SldWorks.Application'))
swmodel, errors, warnings = sw.OpenDoc6(sourceName,
constants.swDocPART, constants.swOpenDocOptions_Silent, "")
activeDoc = sw.ActiveDoc
retval, errors, warnings = swmodel.SaveAs4(targetName,
constants.swSaveAsCurrentVersion ,
constants.swOpenDocOptions_Silent )
pythoncom.CoUninitialize()
test_excel.py
import pythoncom
pythoncom.CoInitializeEx(pythoncom.COINIT_MULTITHREADED)
myExcel = win32com.client.DispatchEx('Excel.Application')
myExcel.Visible = 1
Excel = myExcel.Workbooks.Open(excelfile, 0, False, 2)
Excel.Saved = 1
Excel.Close()
myExcel.Quit()
del myExcel
del Excel
pythoncom.CoUninitialize()
Tim Golden
> Hello,
>
> I start my script convert.py simultaneously in any dos-shells several
> times. But I get every time the same solidworks instance.
> I see in the proccess (task) manager only one solidworks.exe
> Therefore I get for all simultaneous conversions the same output file.
I *think* -- and I'm really hoping someone more knowledgeable
can chip in here -- that it's down to the particular COM
object implementation. ie Excel may choose to offer you
separate instances (or whatever they're called) while SolidWorks
may not.
TJG
Stefan Schukat
Hello Thomas,
excel registers its COM objects with REGCLS_SINGLEUSE that means one COM
object is created
per process. In Solidworks it seems that that they register with
REGCLS_MULTIPLEUSE, which means
on process can serve more than one COM object. Hence you have no chance
to get multiple instances
running in any COM client.
Stefan