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Typical warning message from LUSAS Solver text output file (*.OUT):

***WARNING*** FIRST NEAR-ZERO PIVOT FOUND AT GLOBAL NODE P, FREEDOM NUMBER Q :
MINIMUM ADJUSTMENT MADE WAS 0.100000E-11, MAXIMUM WAS 0.100000E-11
STRUCTURE MAY BE INADEQUATELY SUPPORTED, HAVE ELEMENT MECHANISMS OR MESH DISCONTINUITIES,
OR THE GEOMETRIC/MATERIAL PROPERTIES MAY BE INCORRECTLY IDEALISED (BCSLSV PROCESSOR)


Most common causes & links to solutions 

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. 

The message usually continues by the following messages. 

***WARNING*** MATRIX IS VERY ILL-CONDITIONED (BCSLSV PROCESSOR)
***WARNING*** RELATIVE ERROR IN THE ORDER OF .2176E-01 EXCEEDS RECOMMENDED MAXIMUM OF .10E-01 USE RESULTS WITH CAUTION (BCSLSV PROCESSOR)

Further advice is available by following the hyperlink above.

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 "Node 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.

Node 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


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