Warnings 'No nodes found in project data' and 'Mesh generation: not ok'

If the warning message 'No nodes found in project data!' or 'Mesh generation: not ok' appears when starting a calculation, it means that the solver does not recognize any nodes to take into account for the calculation. This can have different causes – so different solutions are proposed.

In case the SCIA Engineer project has been exported via Main menu > File > Export to > Project (ESA), you might get this message when starting a calculation.
The solution is then to go to the Main menu > Tools > Cleaner, and select there the options ‘Results’ and ‘Universal Data Storage (temporary data)':

After using this Cleaner tool, the calculation will start without the error message.

If the message 'There are some layers "Structural data only" in project. Do you want to continue?' appeared when starting a calculation just before the message 'No nodes found in project data!' appeared, it probably means that all members are located in a layer with as property ‘Structural model only’. This means that not any member (nor node) is taken into account for the calculation.

The solution is to simply deselect the option ‘Structural model only’:

Note: Of course you are allowed to indicate some layers as ‘Structural model only’. The members in those layers might be visible on the screen (if the option ‘Current used activity’ is selected), but are not taken into account for the calculation. Therefore a warning message is shown when starting a calculation.