Excel 2007 XLAM - Error - Is Not A Valid Add-In

Hi Experts,

Can you please help point me in the right direction? How would I go about in troubleshooting the XLAM "Is Not A Valid Add-In" error?

I already set the isAddin = True and using FileFormat:=xlOpenXMLAddIn.

What else could be wrong?

Many thanks in advance
Ronniel Allan CastanitoIT ManagerAsked:
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Ronniel Allan CastanitoConnect With a Mentor IT ManagerAuthor Commented:
I got rid of the error by unlocking the workbook before the installation process.
I suggest you go through your steps with Chip Pearson, one at a time.
Ronniel Allan CastanitoIT ManagerAuthor Commented:
Resolved my error.
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