[Gretl-users] List from string in a function

I am using GRETL 1.912 and ran into a problem using strings in a user defined function I wanted to create a function that accepts a bundle with a set of specification terms. but I understand bundles can not hold lists since the last step in the code below fails list xlist= dy(-1) de(-1) bundle amodel=null amodel.xlist= xlist So I thought I could pass a string of variable names through the bundle since this code works string xstring= "dy(-1) de(-1)" list xlist= @xstring ols dy const xlist However, I get a error message with a function version function matrix olslist1(string xstring) list xlist= @xstring #fails ols dy const xlist #ols dy const @xstring #also fails return $coeff end function The message is The symbol 'dy' is undefined The problems seems fundamental to strings in a function since print @xstring works outside of function but fails inside a function Or am I using strings and functions incorrectly?