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A skim matrix calculation produces new matrices, but the already existing matrices in the model are not updated.

Since PTV Visum 14 matrices can either be defined using their unique matrix number or their properties. Properties are combinations of attribute values which identify one or several matrices. The second option is since then available in various dialogs of the software.
If matrix numbers or properties of existing or for new matrices changed, procedures will create new matrices:
- In the list Matrices, check the attributes Code and DSegCode to meet the correct values.
- Calculate -> General procedure settings -> PrT settings -> Skims -> 'Code / file'
- Calculate -> General procedure settings -> PuT settings -> Skims -> 'Code / file'