Composite string questions

[Peter.Higgins]

Hi List,
Having difficulties getting composite strings within a test object to work.
File are opened object input but I have also tested open input and open. 
I am testing for some composite strings as local scope and others to be within the procedure scope.
The odd thing is that when composite read record lines from non object programs are used, the file iolist is populated with data, and the variable has the complete record, and lst(iol(rec$)) returns the IOLIST, even though the composite string returns nothing. 
testing in Ver 2017
Is using a composite string in an object possible?