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I get error "430: Class does not support automation or does not support expected interface" when opening an Access MDE on some of my user PCs.
I also found the answer. My PC has Win7 SP1 with Access 2003. The users PCs had the same except they had not installed SP1 for Win7. Did the install for them and everything worked fine.
A family of Microsoft relational database management systems designed for ease of use.
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Install Win 7 SP1 on all PCs and everything worked fine.
Or create the MDE on Win7 without SP1 and deploy to Win7 PCs.