User Area > Advice
Typical error message found in the LUSAS Solver text output file (*.OUT):
***ERROR*** ELEMENT
NUMBER P, NODE Q, VARIABLE R HAS ILLEGAL DIAGONAL DECAY = S
The most common cause of such a message is that there are
insufficient supports assigned to the model. It is necessary to ensure
that there exist supports that restrain the entire model from rigid
body movements. The model should not be free to translate or rotate
freely. More
common causes on a page of related warnings
How to find the target Node
or Element:
Solver error or warning messages
are also scanned from Solver .out file and reported in Modeller
Text Output window. By default the Text Output window appears at
the bottom of the graphics window just above the Status Bar. This
displays messages and warnings during a modelling session.
Specific objects referred to in error and diagnostic messages in
the text window by ID number in the form "Element P" may
be identified using the identify object dialog. The “Identify
Object" dialog is invoked by double clicking on the
message text. From this dialog the identified object may be
selected, moved to the centre of the screen, scaled to fill the
screen, have its properties displayed, or identified by an
annotation arrow or a temporary indicator.
Element P can also be located in
the model using Advanced Selection, activated by
right- clicking with the mouse in the graphics window, or via:
Edit > Advanced Selection
Alternativley, the element numbers can be located in the
model using a Labels layer:
TreeView > Layers tab > Labels > (check) Element,
Name (check)
Label selected features only
Continued difficulties? Try
the pivot checklist
The diagonal decay measure used
in the Frontal solution method is discussed in the the
following reference:
Help > Help Topics > Contents
>Theory Manual Volume 1 > Section
2.2.2 Frontal Solver
More on diagonal decays
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