Points that are too close to each other. They cause irregularies in the mesh. For example:

• Meshlines that run across the model
• Missing green lines (= indication of a free border) were you would expect them.

Solution

• Go to the menu Options > Preferences > tab page ‘Model’
• Set the geometric tolerance to 3cm.
• Close this window
• Generate the mesh.
• Start the elastic analysis . The following warning will appear:

Impossible to calculate structure: few points are too close

Something went wrong while verifying the structure

[NL]: Niet mogelijk om structuur te berekenen. Enkele punten liggen te dicht bij elkaar. Er is iets fout gegaan bij het verifiëren van de structuur.

[FR]: Impossible de calculer la structure: quelques points sont trop prêts les uns des autres. Quelque chose ne s’est pas bien passé en vérifiant la structure.

[ES]: Imposible calcular la estructura: Algunos puntos están demasiado cerca.

• Diamonds will select automatically the points that are too close to one another.
  Note that the location of these points is not necessary the place where the reactions are zero.
• If these elements are not immediately visible, use the button   to only see these points. Use F10 to center these elements on the screen.
• Join the points together.
  • Join them manually by adjusting the point coodinates in the data table . Request sufficient decimals (menu Options > Units & Decimals)!
  • Use the projection function (recommended)
  • Use the structure verification