AllAccepted answers
Robert Cemper · Feb 14, 2018

Oliver,

this turned out to be somewhat more tricky than expected.
The way you used stream.FindAt(...)  returns the size of the gap between the last found occurrence and the next.
So you have to add the size of your search string for each loop to get closer to your file size

so it might be easier to do it this way:

set last=1
for  set i=stream.FindAt(last,"Invalid password") quit:i<0  set last=i

this might be closer but definitely smaller than the total size  

Robert Cemper · Feb 14, 2018

it says:

If it does not find the target string then return -1 . 

So what you get in i is the last start of your search string

              Which is 2491024949 - 2442920326 = 48104623 from end.
It's almost the same as your first occurrence at 49134354. Looks feasible.

To get the file size as you expect the LAST search string must have been  starting
AT the end of your file. Which is a contradiction.

Robert Cemper · Feb 14, 2018

your code: from Docs:

set i=stream.FindAt(-1,"Invalid password",x)+i

from Docs:
 

Find the first occurrence of target in the stream starting the search at position.
It returns the position at this match starting at the beginning of the stream.
If it does not find the target string then return -1.
If position=-1 then start searching from the current location and just return the offset from the last search,
useful for searching through the entire file.
If you are doing this you should pass in tmpstr by reference in every call which is used as
a temporary location to store information being read so the next call will start where the last one left off.
If you pass caseinsensitive=1 then the search will be case insensitive rather than the default case sensitive search.

 
So your line should work like this
while(stream.AtEnd=0){set i=stream.FindAt(-1,"Invalid password",.x)+i}
-----------------------------------------------------------------^
PASS BY REFERENCE should do the trick
Robert Cemper · Feb 10, 2018

I assume this is the Trial version  !    

if you log in the management portal  you should have a management account _SYSTEM
and it has a 3 letter password    SYS   or sys

http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=RSQL_defaultusernamepassword#RSQL_C127680

http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=GCAS_users#GCAS_users_predefined
 

Robert Cemper · Feb 9, 2018

Arun,
#1) the error <INVALID OREFF>  #2) goes away if you use Method BtnClickMe( ...)   instead of  ClassMethod BtnClickMe(....)

#2) setting title property turns out to be tricky since component DataCombo is a complex structure with multiple HTML elements
with multiple title properties.  The ZENmethod  setProperty() reaches only the first one.
Which is the Label (!) and if you didn't declare it in the ZEN class it is hidden and you will never see it.

As a consequence I found this code working:

<dataCombo 
    ......
    title=""  
    onmouseover="zenPage.BtnClick(event.currentTarget);" 
    />

event.currentTarget gives you the real browser component (<input...>) in hands

ClientMethod BtnClick(DTCOMBO) As %String [ Language = javascript ]
{
    var MyPriority=DTCOMBO.value;
    var result=zenPage.BtnClickMe(MyPriority);
        DTCOMBO.title=result ;
    return;
}

All settings of the page happen in client code. 

/// calculate content of title
/// actually a fake for testing
Method BtnClickMe(MyPriority) As %String [ ZenMethod ]
{
    set ^%Arun($i(^%Arun))=MyPriority
    quit MyPriority_"****"_^%Arun
}

Now as you do not depend on %page object now this could be a ClassMethod as well.

Robert Cemper · Feb 9, 2018

from last comment: 
https://www.sqlservercentral.com/Forums/Topic647815-145-1.aspx

Difference between varchar(max) and varchar(8000)
Varchar(8000) stores a maximum of 8000 characters. Varchar(max) stores a maximum of 2 147 483 647 characters. 

See Books Online, the page titled "char and varchar" for more info. 

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
 

so it can be marked as done.

Robert Cemper · Feb 9, 2018

from: 
https://www.sqlservercentral.com/Forums/Topic647815-145-1.aspx

Difference between varchar(max) and varchar(8000)
Varchar(8000) stores a maximum of 8000 characters. Varchar(max) stores a maximum of 2 147 483 647 characters. 

See Books Online, the page titled "char and varchar" for more info. 

Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
 
Robert Cemper · Feb 8, 2018

Not sure if this is the real problem: Anyhow it is a problem.

   var result=this.BtnClickMe(MyPriority);   // here you expect a return value
    return;
}


ClassMethod BtnClickMe(MyPriority) as %String [ ZenMethod ]     // return something
{
    set ^%Arun($i(^%Arun))=$isObject(%page)    // JUST temporary for debugging // check for <INVALID OREF> 
    Set %page.%GetComponentById("Priority1").title=MyPriority
  quit $$$OK      // return something
}