This code simplifies the situation:
compile_opt strictarr
ec=hash()
ec =dictionary('l', lambda('x:x^2') )
a={a:lambda('x:x^2')}

scr=ec['l']
scr1=a.a
print, scr(1), scr1(1)

What is the syntax for accessing the lambda expression without the dummy variables scr and scr1. For example
ec.l(1), (ec.l)(1), ((ec.1))(1) all return "undefined method for dictionary" or "syntax errors."