Symptom

The connection to a Personal Geodatabase fails:
"No ESRI found!"
"A 64 Bit version of ESRI ArcGIS is not yet available. Cannot connect to a geo database".

Cause

- This interface supports only ArcGIS 8 to 10.3, not yet ArcGis Pro.
- Using PTV Visum 16 64 bit or older.

Resolution

- When using PTV Visum 16 or older: Using a 64 bit OS, you have to install Visum 32 bit in addition, to connect PTV Visum with a Personal Geodatabase.
- Since PTV Visum 17 only Visum 64 bit is available, but this is able to connect to the 32 bit Personal Geodatabase interface.

Workaround

Export the data to a Shapefile and either import this into PTV Visum (File -> Import -> Shapefile), or visualize this als Background:
Network -> Backgrounds -> Network editor -> Insert mode -> (click into the Network editor) -> Create background -> Graphics file -> OK -> Open: Background -> (select Shapefile) -> Open