Softimage SDK Programmer's Guide > Script Development > Understanding Error Messages >

# ERROR : <enum_name> is not defined

     #ERROR : Traceback (most recent call last):
    #  File "<Script Block >", line 2, in ?
    #    rtn = app.ActiveSceneRoot.FindChildren("","",siMeshType)
    #NameError: name 'siMeshType' is not defined
    # - [line 2]

## Possible Cause

This is a message that typically appears when using Python because the constants (enums) are available only as an imported module.

## Suggested Solution

You can import the constants module and then specify the name of the constant or enum as its member (see How Do I Get Python to Recognize Softimage Constants (Enums)?).