Hi,
I've never heard that Access would lock up the Citadel database. Maybe you contact National Instruments Support team to reproduce this issue.
National Instruments prefered solution for big, powerful, nice report generation is done with
DIAdem that includes a plug-in to read Citadel 4 data. Please check it out or download the evaluation version!
However, if you still want to keep MS stock up you might check out the KB
Accessing Citadel Data from Other Software and
Accessing Citadel Data with Microsoft AccessHope
this help.
Roland
PS: By the way - the new Citadel 5/LabVIEW DSC 7 ODBC driver is much more powerful and is compatible with SQL/92 and ODBC 2.5!