"If" returns error response

[#1]

I have a script to draw charts and use "if" for the reference line.

"Sometimes" the reference line is not correct. 

For example, when Rel_Test=H3TRB, the reference line should be 10, but it shows 5.

How could I fix it?

d6_graph=dt2 << Graph Builder(
	Size( 400, 300 ),
	Show Control Panel( 0 ),
	Variables(
		X( :Lot),
		Y( :dIGSS, Position( 1 ) ),
		Color( :Lot ),
		By(:Rel_Test)
	),
	Elements( Box Plot( X, Y( 1 ), Legend( 16 ) ) ),
	SendToReport(
		Dispatch(
			{},
			"dIGSS",
			ScaleBox,
			{Min( 0 ), Max( 20 ), Inc( 5 ), Minor Ticks( 1 ),
			Add Ref Line(
				If(:Rel_Test=="H3TRB" | :Rel_Test=="HAST" | :Rel_Test=="UHAST" | :Rel_Test=="PCT",10.0,5.0),
				"Solid",
				"Medium Dark Red",
				If(:Rel_Test=="H3TRB" | :Rel_Test=="HAST" | :Rel_Test=="UHAST" | :Rel_Test=="PCT","1000%","500%"),
			)}
		),
		Dispatch( {}, "graph title", TextEditBox, {Set Text( "dIGSS" )} ),
		Dispatch( {}, "Y title", ftest_name, {Set Text( "dIGSS" )} )
	)
	
);   

JMP version: 17.2.0