I wanted to add...
I suspect you are using 64-bit EG. EG uses the Microsoft Jet Engine provider to write to the .mdb format. The Microsoft Jet Engine is 32-bit only, thus only works in 32-bit EG, thus exporting to .mdb (via the client UI) is only available in 32-bit EG.
EG's system requirements doc has this note:
"Note: On 64-bit operating systems, SAS recommends using the 32-bit version of SAS Enterprise Guide for greater compatibility with data providers. See reference, SAS Deployment Wizard and SAS Deployment Manager 9.4 User's Guide.pdf for more information."
Related, but applies to import rather than export... in the EG help (Help->SAS Enterprise Guide Help), the "Working with Data: File types that SAS Enterprise Guide reads and writes" topic has this note:
"In the 64-bit version of SAS Enterprise Guide, you can import Microsoft Access files (*.mdb, *.accdb) only if the 64-bit version of Microsoft Access or the 64-bit version of the Microsoft Office System (ACE) Driver is installed. Similarly, if you are running the 32-bit version of SAS Enterprise Guide, then you must have the 32-bit version of Microsoft Access or the Microsoft Office System (ACE) Driver in order to import Microsoft Access files."
Note: The comments above apply to the client, when the client is performing the import or export (rather than SAS code on the server). The server (ex. processing proc import and proc export) has different, but similar requirements. See proc import/export doc for those.
Casey
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