Stop adding rows based on what the text contains

[JGoode]

I have a way of working this problem out. I just don't know how to implement it.
(I apologise for the amount of posts but this is very frustrating!!)
All I need is the ability to stop counting the lines based on what one of the rows contains.
Is there a function that will do what I want it to?

The row that I don't want to include starts with "EF_25" which is what I should be able to use to identify it but I just don't know the line/s of script that will help me achieve it.

DIM sarray[]
var = ""
! file in the library, containing parameter data
filename = "ProjectNotes.txt"
ch1 = OPEN ("text", filename, "MODE=RO, LIBRARY")
i = 1
j = 1
y=1
sarray[x1] = ""
for z = 1 to x1
    n = INPUT (ch1, y, 1, var)
        sarray = var
        j = j + 1
   		i = i + 1
		y=y+1
next z
CLOSE ch1
! parameter popup with strings read from the file
VALUES "RefNote" sarray

x1 = vardim1(sarray)

Thank you.

[Jochen Suehlo]

Haven't you try the DATA Addon? The first entry in each line you can use as searchfield and then read the rest of only this line.
In the GDL cookbook it is explained well. (https://www.nottingham.ac.uk/~lazwww/cookbook/)

[sinceV6]

Hi.
You could use STRSTR for each line and [GOTO "label"] outside the counting loop once the string is found.

Best regards.