I found a way to remove the error, thanks to: DtM
The reason why it gives this error is because it's translated from english to dutch in a bad way.
Please note: Close iGuidance before editing it with ResHack!
1. Download ResHack from:
http://delphi.icm.edu.pl/ftp/tools/ResHack.zip
2. Make a backup of iguidance.exe
3. Start ResHack and open iguidance.exe (file -> open)
On the right you see a tree structure with all the bitmaps and strings.... of the program.
4. Open de map 'Strings' and also open map '379'.
You will find two subitems. 1033 is the language code for english and 1043 for dutch.
5. Copy the string 6058 from map 1033 under string 6063 in map 1034.
7. Click on the 'Compile' button and then save the file (file -> save)
Now iGuidance should work without the error.
I've tested it and it works great! Big thanks to DtM