Hi, I am unable to save my data in the editable grid into the PV. Can

...                                                            itemsToken: local!costElementsList
                                                                      ),
                                                                      array: if(or(isnull(local!costElements), count(local!costElements) < 1), {}, 1+enumerate(count(local!costElements))),
                                                                      arrayVariable: local!costElementsList
                                                            ),
                                                            validations: {
                                                                      /* Check the total amount and show a message immediately */
                                                                      with(
                                                                                local!total: todecimal(local!costElements.splitPercentage),
                                                                                if(rule!SI_checkNull(index(local!costElements, "costElementID", "")), null, if(not(local!total = 100),
                                                                                          a!validationMessage( message: "The total of all split percentage must be 100%. It is currently " &
                                                                                          if(rule!SI_checkNull(local!total), 0, local!total) & "%.",validateAfter: "SUBMIT"), null))
                                                                      ),
                                                                      /* Check the # items and show a message on submit */
                                                                      if(rule!SI_checkNotNull(index(local!costElements, "costElementID", "")), null,
                                                                                a!validationMessage( message: "Please enter at least 1 cost element.",validateAfter: "SUBMIT"))
...

...                                                            }
                                                  ),
                                                  a!linkField(
                                                            label: "Add Link",
                                                            labelPosition: "COLLAPSED",
                                                            links: a!dynamicLink(
                                                                      label: "+Add Item",
                                                                      /*
                                                                      * For your use case, set the value to a blank instance of your CDT using
                                                                      * the type constructor, e.g. type!PurchaseRequestItem(). Only specify the field
                                                                      * if you want to give it a default value e.g. due: today()+1.
                                                                      */
                                                                      value: {splitPercentage: null},
                                                                      saveInto: {
                                                                                a!save(local!costElements, append(local!costElements, save!value)),
                                                                                /*` When modifying the size of the array used in a!applyComponents, */
                                                                                /* make the same change in the "token" array variable */
                                                                                a!save(ri!travelCostElementsList_cdt, append(local!costElementsList, save!value))
                                                                      }
                                                            )
                                                  )

I am unable to save it into the ri!travelCostElementsList_cdt that will eventually put into the PV that I mentioned. Somewhere that I have missed out??

Hi wilt, if possible can you please attach the code for the rule TRAVEL_SAIL_costElementItemRow, which you have been used in the gridlayout. It would be helpful in figure out the issue and solution.

Do the below changes, So that the values will store in "travelCostElementsList_cdt" rule input.
In GridLayout
items: ri!travelCostElementsList_cdt,

In link Field
          saveInto: {
                    a!save(ri!travelCostElementsList_cdt, append(ri!travelCostElementsList_cdt, save!value)),
                    a!save(local!costElementsList, append(local!costElementsList, save!value))
                    }
In your code, the values are local variables. And you are appending

Can you verify whether the variable - ri!travelCostElementsList_cdt has grid values by testing in the interface.

Also as per the below code, grid values are stored in the local variable - local!costElements. We have to store the values in local!costElemets to ri!travelCostElementsList_cdt before submitting the form.
a!applyComponents(
function: rule!TRAVEL_SAIL_costElementItemRow(
items: local!costElements,
index: _,
itemsToken: local!costElementsList
),
           ....)

@Wilt,Before going to PV variable, first check the data is coming to ri!travelCostElementsList_cdt variable.
If it is fine then create ac!travelCostElementsList_cdt(multiple type) in UIT(User input task) and saveInto pv(multiple) variable.
while calling these interface rule pass the ac!travelCostElementsList_cdt varible like rule!gridLayoutRule(travelCostElementsList_cdt:ac!travelCostElementsList_cdt)