topic Re: JSL failing in version 19 but works in 17 in Discussions

JSL failing in version 19 but works in 17

MarginalMouse87 — Thu, 02 Jul 2026 16:54:39 GMT

I just upgraded to JMP 19 from JMP 17. I have a long and complicated routine that works well when I use it in JMP 17 but fails when I try it in 19. There may be more failures but the first one I am encountering is related to selecting rows to be modified to fix known errors in the data I imported. When debugging, I can see that the Get Rows Where command is returning an empty matrix. I confirmed that the targeted row is in the data table and I can force the program to select it by entering the criteria in the menu windows.

row_to_update = newContrib << Get Rows Where(:"request_id" == 263496 & :"line_no" == 0);

The subsequent command fails to make a desired correction on that row because row_to_update returns this: [](0, 1)
newContrib was defined earlier as a data table. When I hover over the variable name, the pop-up has the right table.

Based on the documentation, I tried modifying the line to use Where instead but failed identically.

row_to_update = newContrib[Where(:"request_id" == 263496 & :"line_no" == 0)];

I could not find anything in release notes. I seem to have the right syntax according to the help manuals.
Could someone please explain what has changed that this no longer works and maybe how to fix it?

Much appreciated!

Nancy

Re: JSL failing in version 19 but works in 17

mmarchandFSLR — Thu, 02 Jul 2026 20:20:41 GMT

<< Get Rows Where does still work that way in JMP 19. Your second command (using Where()) should change a bit.

Names Default To Here( 1 );
dt= Open( "$SAMPLE_DATA/Big Class.jmp" );
row_to_update = dt<< Get Rows Where( :"name" == "JANE" & :"age" == 12 );	//[3]
row_to_update2 = Where( dt, :name == "JANE" & :age == 12 );		//[3]

row_to_update = Where( newContrib, :request_id == 263496 & :line_no == 0 );

As for what the issue might be? Check to make sure the data types are correct. Does JMP 19 pull in those columns as character, while JMP 17 did as numeric? It's likely something simple like that, since the syntax for << Get Rows Where has not changed.

Re: JSL failing in version 19 but works in 17

Jed_Campbell — Thu, 02 Jul 2026 20:25:57 GMT

Hi Nancy,

The [](0,1) means row_to_update is an empty list, so there aren't any matching rows in the data table. Since Get Rows Where () returns a list, you might be better served with the different approach in the script below:

names default to here (1);

newContrib = New Table( "newContrib",
	Add Rows( 3 ),
	New Column( "request_id",
		Numeric,
		"Continuous",
		Format( "Best", 12 ),
		Set Values( [263496, 263496, 263496] )
	),
	New Column( "line_no",
		Numeric,
		"Continuous",
		Format( "Best", 12 ),
		Set Values( [0, 0, 1] )
	)
);

row_to_update = newContrib << Get Rows Where(:"request_id" == 263496 & :"line_no" == 0);
//row_to_update is [1,2]
row_to_update = newContrib << Get Rows Where(:"request_id" == 263497 & :"line_no" == 0);
//row_to_update is empty: [](0, 1)
row_to_update = (newContrib << Get Rows Where(:"request_id" == 263496 & :"line_no" == 0))[1];
//row_to_update is 1 

//a different approach:
rows_to_update = newContrib << Get Rows Where(:"request_id" == 263496 & :"line_no" == 0);
if (n items(rows_to_update) > 0, row_to_update = rows_to_update[1]);