Return of an error to the user because of a wrong Excel file selected

[#1]

Hello, 

I would like to create a JMP program which returns an error to the user because he selected the wrong Excel file.

Here is an example of my program:

The  file_path contains the path to the file selected by the user.

However, I would like to return a message error when the Worksheets( "AAA" ) is not contained in the Excel file selected by the user: because he didn't choose the right Excel file.  

Funct = Function( {file_path, visib},
	Eval(
		Eval Expr(
			myTable = Open(
				file_path, 
				Worksheets( "AAA" ),
				Use for all sheets( 1 ),
				Concatenate Worksheets( 0 ),
				..
				),
				Expr( visib )
			)
		)
	);

Is it possible to make an if condition ? If the file selected doesn't contains the worksheet in question, then JMP returns the message error ?

However, I don't know how to make it.

Does anyone have a solution?

Thank you very much for your answer,

Sébastien

[#2 · Accepted solution]

There is a function called Get Excel Worksheets(). You can combine it with Throw() or make your own modal window for example

Names Default To Here(1);
sheetList = Get Excel Worksheets(
	"$SAMPLE_IMPORT_DATA\Team Results.xlsx"
);
If(!Contains(sheetList, "AAA"), 
	Throw("No 'AAA' found from excel sheet list");
);

[#3]

Thanks a lot it works!