"Field "Maan" not found":
On a Monday (Maandag in afrikaans)
Where "Maan" is the short name for the current day of the week.
This is caused by your regional settings not being set to English US or UK.
By changing to this, your problem should be resolved.
Also See: Windows 95 Regional Settings Problems
This has been fixed in TOPAZ 1.7.0.4 !!!