Returns 0 if display is less than or equal to 0, 1 otherwise.
'msg' is the message to be displayed. It must be either a literal surrounded by single quotes ' or a String variable.
The MESSAGE function is used to pass a message to the user in response to some condition in the model. It can, for example, be used to put up a dialog informing the user that a certain condition has been met. The way in which the message is displayed depends on the value of the display parameter. If display is equal to 1 the message will go to the scrolling list of warnings. If it is 2 a message box will come up with a informational prompt, 3 with a warning prompt and 4 with a stop prompt.
Because the MESSAGE function is most useful for putting up a single message it is typically used in conjunction with the SAMPLE IF TRUE function to be sure that the message only appears a single time. The example below demonstrates how to do this. The MESSAGE function is designed to work with any integration technique. If you are using a Runge-Kutta integration technique it will not put up a message or return a non-zero value within an integration step.
Example
msg = SAMPLE IF TRUE(:NOT: msg,IF THEN ELSE(:NOT: msg :AND:
project is started > 0,MESSAGE('Project Started',5),0),0)
This will put up a message the first time the variable project is started takes on a non-zero value.
Availability: Not PLE or PLE Plus.
See also: SAMPLE IF TRUE
Sample model: MESSAGE.mdl and MESSAGE + SAMPLE IF TRUE.mdl in FunctionExamples
