[IronPython] Getting type error when calling a .NET DLL interface.

[Max Barry]

Hi all,

I am trying to call an interface from DLL created in .Net to work with a
IronPython script and am getting the following error when I run the
code:

 

TypeError: Cannot create instances of IDSSCatalog

 

The trace is below:

 

Traceback (most recent call last):

  File ".\Tutorial\ShiftIntervalMaxValue.py", line 82, in RunApp
Process()

  File ".\Tutorial\ShiftIntervalMaxValue.py", line 97, in Process
dictgages = GetCatalogDictFromDSSRS(db,DSS_RS_FILTER)

  File ".\Tutorial\ShiftIntervalMaxValue.py", line 176, in
GetCatalogDictFromDSS RS  ds = CatalogAsDataSet(db)

  File ".\Tutorial\ShiftIntervalMaxValue.py", line 198, in
CatalogAsDataSet  dssCatalog = IDSSCatalog(db)

 TypeError: Cannot create instances of IDSSCatalog

 

Below is an example of the code that created the error:

import clr

 

def LoadTSMNet():

    import string,sys

    from os import path

    #from System.Reflection import Assembly      #Import .Net Assembly
to import DLL

    

    mypath = path.dirname(sys.argv[0])

    tsmpath = path.join(mypath,"TimeSeriesMgrNet.dll")

    tsmpath = string.replace(tsmpath,'\\','\\\\')

    clr.AddReferenceToFileAndPath(tsmpath)

    #Assembly.LoadFile(tsmpath)

 

LoadTSMNet()

clr.AddReferenceByPartialName("TimeSeriesMgrNet")

import TimeSeriesMgrNet

from TimeSeriesMgrNet import IDSSCatalog, DSSDatabase

 

DSS_DATABASE_PATH = "C:/temp/myfile.dss"

db = DSSDatabase()

db.Name = DSS_DATABASE_PATH

db.Connect(False)

dssCatalog = IDSSCatalog(db)

dssCatalog.MakeNewCatalog('')

ds = dssCatalog.AsDataSet(True,'')

db.Disconnect()

 

IDSSCatalog is the interface and DSSDatabase implements the interface.
Any ideas on why I am getting this error?

 

Thanks,

Max

 

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