Inconsistent behavior when pushing worksheet to a workbook.

[Ben Hines]

I wrote an add-on for Seeq which is intended to add a new worksheet to the active workbook while preserving the existing worksheets in the workbook.  I'm seeing inconsistent behavior.   When the workbook resides in a user's home directory, my add-in does exactly what I expect, which is add a new worksheet to the existing workbook.  However, if the workbook resides in a subdirectory of the user's home directory, then the new worksheet is added to the workbook as expected, but all other worksheets in the workbook are gone.  

Can anyone explain why I'm seeing this behavior?   I'm going to try to put together a skinnied-down datalab script together to exhibit this.

[Ben Hines]

I found the bug.  I was failing to take into account the path of the workbook when I pushed the new worksheet.