GSP contains extensive error handling routines providing information in the form of error messages.

Three types of error can be identified:

•User input errors

User input errors are generated usually before (or sometimes after) a simulation run when GSP detects that input is invalid or conflicting with other input or that a model configuration is invalid.

•Simulation errors

During simulation, errors may occur due to conditions such as inconsistent model configurations, thermo-dynamical limitations encountered beyond the operating envelope, unrealistic transient inputs and many more. Generally, errors result from non-realistic engine model operating conditions or component parameters.

•Results processing errors

These type of errors may occur:

- at the end of a simulation calculation during post-processing of simulation result data, calculation of derived parameters, or

- during presentation and analysis of results in graphical or tabular format for example when parameters required for graphical presentation parameters are missing.

Errors can be generated by:

•the global GSP environment and/or the gas turbine model, or

•by the code for a specific component

The error messages are divided in two categories:

•Model specific error messages

•Component specific error messages