Selection of one group item to meet requirement

On a client website, there are a number of fields, all containing different items and the client would like to ensure that at least 1 item is selected from any field. I have grouped the fields together, and set the group to required, hoping this would be the result, but it seems Required has no effect in this Grouped field scenario.

Thoughts/suggestions?

Field Group Fields can't be empty since there's always at least 1 row so marking them required doesn't really do much right now. You need to mark the fields in the field group as required.

Thanks.
So to accomplish what the client wants, could an auto action check a number of fields to ensure at least one item has been selected before submission?
Then display a message about making a selection if none was made?

Does this need to be a field group? You mention selection. Wouldn't a single multi-checkbox or multi-select fieldtype that's marked required accomplish this?

Unfortunately, there are 7-seperate fields with 10-30 items in each field to select from. The different fields are used to group similar items and allow searching within a field group.
examples:
Industry:

• Accounting
• Law
• Dentistry
• Education
• etc

Functions

• Creative
• Administrator
• Assistant
• etc

So someone doesn't need to make a selection in each field, but the client wants them to select at least 1.

You'll need custom validation rules to do that. The only thing I can think of is CB Code Field and its Code Validation functionality which lets you implement custom PHP based validation rules. The way it would work is when validating Field A you'd write the code to check if Field A OR Field B has a value and if it does then the field is valid. Example as follows.

Field A
Code Validation: Enable
Code (PHP): Ajax Validation: Enable
Additional Fields: FIELD_B_HERE

Replace FIELD_B_HERE with the name of whatever the second field is. You'd then select that same field in "Additional Fields" parameter for the client side validation behavior. Now just add more OR PHP cases and select additional fields as needed to add more fields to the validation check.

Now you'd edit Field B and do similar as follows.

Field B
Code Validation: Enable
Code (PHP): Ajax Validation: Enable
Additional Fields: FIELD_A_HERE

This should allow the fields and form to validate if Field A or Field B has a value.