After modeling, run Error Check 
before running an analysis. The error check verifies input data by checking each
individual piping element for consistency and builds the execution data files used
by the analysis and review processes.
All messages display in the Errors and Warnings Tab (Errors and Warnings Dialog). Errors that prevent the analysis from running (such as a corrosion allowance greater than the wall thickness) flag as fatal errors and display in red text. Unusual items (such as a change of direction without a bend or intersection) flag as warnings and display in green text. Other informational messages that may show intermediate calculations or general notes display in blue text.
Double-click an error or warning message to display the parameters of the associated
element and highlights the element in the graphic view. Sort error messages by selecting
the column titles. Use Print 
to print the entire error report or selected sections. Use the options arrow 
of Error Check to display only fatal errors or all errors.
If the error check process completes without fatal errors, a center of gravity report displays, the analysis data files are generated, and the solution phase can commence.
If there is a fatal error, the analysis data files are not generated, and the solution
phase cannot begin. Return to the Classic Piping Input Dialog to make corrections and rerun Error Check .