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From: ILya on 1 Feb 2010 01:45
I work with TclTk 8.4.13 on WinXP and use TCom for create/open/edit an
Excel files.
The below script is working well, but suddenly yesterday it crashed.

set application [::tcom::ref createobject "Excel.Application"]
set workbooks [$application Workbooks]
set workbook [$workbooks Open $fileName]
$application Visible 1
set worksheets [$workbook Worksheets]

At this stage the following error was raised:
invalid command name "::tcom::NULL"
invalid command name "::tcom::NULL"
while executing
"$workbook Worksheets"
....

*) The "fileName" is an existing xls file. Today I succesfully opened
it with the above script.

My questions are:
1. What can cause to tcom to operate the NULL command?
2. Why tcom doesn't have the NULL command?

Thanks, Ilya

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