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The import or export of a MS-Acces database fails with the following error message:
- 'Could not start VisumDbServer.exe'
- 'VisumDbServer not registered correctly'

The component VisumDBServer.exe/VisumMdbServer.exe was not registered correctly. Try the following methods to register it again:
1) Help -> Register as COM Server
2) Run any current service pack suitable to your installation.
3) Register VisumXXX.exe again:
Start -> Execute -> 'C:\Program Files\PTV_Vision\VISUM170\Exe\Visum170.exe' -reg
4) As a test, disable the antivirus software, and if positive add an exception.