PTV Visum - Frequently Asked Questions (FAQs)

(#VIS24977)

After clicking 'Open' in the dialog 'Open: Background' an error message is returned:
'Cannot load background file ..'

The DWG file is written in a newer format as supported by the used PTV Visum release.
If you want to find out, open the binary DWG file in a text editor. The first characters might be like 'AC1027', which meets 'AutoCAD 2013'.

Recommendation: Update to the current release:
http://cgi.ptvgroup.com/php/vision-setups/?lng=en