Certainly, the vertical bar symbol is used in REXX statements for a logical OR.

(WORDPOS(EDMGETV(ZCONFIG,ZHDWCTYP),'LAPTOP')=0)|(POS('PLD',UPPER(EDMGETV(ZCONFIG,ZHDWCOMP)))=0)

I have added two sets of () as well.

Tested but not working :/

There is no syntax error in the statement.

It will evaluate to True if ZCONFIG,ZHDWCTYP does not contain the word 'LAPTOP' OR if ZCONFIG,ZHDWCOMP translated to uppercase does not contain the string 'PLD'.

In other words, it will stop resolution if machine is not a laptop, or, if machine hostname does not contain the string 'PLD'.

Is this what you wanted?

Correct. I've tested on my lab seperatly WORDPOS(EDMGETV(ZCONFIG,ZHDWCTYP),'LAPTOP')=0 and POS('PLD',UPPER(EDMGETV(ZCONFIG,ZHDWCOMP)))=0 and it was work fine but not with | OR switch

Try it with || in place of OR between the expressions.

My suggestion sure works in my 9.1 CP1 lab env.

I presume you have set the ZSTOP at the ZSERVICE level.

Here are my test results, in my case I am dealing with a DESKTOP whose hostname is NO00999535CD89.

(WORDPOS(EDMGETV(ZCONFIG,ZHDWCTYP),'DESKTOP')=0)|(POS('999',UPPER(EDMGETV(ZCONFIG,ZHDWCOMP)))=0)
Evaluates to False, application installed

(WORDPOS(EDMGETV(ZCONFIG,ZHDWCTYP),'LAPTOP')=0)|(POS('999',UPPER(EDMGETV(ZCONFIG,ZHDWCOMP)))=0)
Evaluates to True, application not installed

(WORDPOS(EDMGETV(ZCONFIG,ZHDWCTYP),'DESKTOP')=0)|(POS('909',UPPER(EDMGETV(ZCONFIG,ZHDWCOMP)))=0)
Evaluates to True, application not installed

(WORDPOS(EDMGETV(ZCONFIG,ZHDWCTYP),'LAPTOP')=0)|(POS('909',UPPER(EDMGETV(ZCONFIG,ZHDWCOMP)))=0)
Evaluates to True, application not installed