Proceed button is greyed out

Hi,

We see issues when Product sructure is having Attributes which are configured with below two UI Propeorty

1) LineItemICField       Prod Prom Name
2) ConstraintReadOnly  Y

I coudle able to reproduce this even in Sample.

Setup is done as follows:

Product :

Belgacom Internet  -> with Class 'Internet'
               Relations   Subscriptions       -> with three Products ( A,B,C)
                                ValueAddservs    -> with one Product ( VPU)

Added one Text Attribute 'Tech Prom Name' with below two Properties
1) LineItemICField       Prod Prom Name
2) ConstraintReadOnly  Y

Constraint: When 'Tech Prom Name' = Pack Internet and selection of Product 'A' exludes Product 'VPU'.

Bundled Promotion setup is as follows:
Pack Internet