Form checklists get "cannot be assigned to TEXT" error

Among the items on my form I have several checklist widgets, with values bound to JSON form variables. I've found that whenever I try to select anything on the checklists, the form won't submit - the error explanation on the Engine Log looks like:
[Victoria, Prince George, Burnaby] cannot be assigned to TEXT{lName=Smith, newUserRequestor=Jane Doe, endDate=null, jobTitle=null, fName=John} cannot be assigned to COMPLEX type
This error hasn't come up when I use other types of widgets, including dropdown lists and radio lists.

Como guardar/obtener los valores de un checklist en Bonita 7.4?

me ha sido muy difícil crear algo tan simple como guardar y luego obtener los datos de un checklist desde un formulario.
Como lo hago para guardar los valores seleccionados en un checkboxlist desde un formulario en mi BDM?
La información que he visto es muy baga y las soluciones son para versiones anteriores a 7.x

How to save/get selected checklist values in Bonita 7.4?

I'm having a hard time trying to do something as simple as saving a group of values from a checklist.
How do you manage the checkboxlist to be saved in the BDM like you do with any other widget in a form?
All the information I have found is for older versions.
Thank you!

Bonita 6.3.3 - Checklists - grouped validation

Hi there,

Bonita Studio 6.3.3, Java, Windows 8.1

I have two Check Lists where either both can have checked values or either may have checked values.

What's the best way to validate this situation without having to loop back on Submission?

Currently Validators only work on one item (widget only), is there a way to group the validators?

Thanks and best regards Seán