Tree browser interface

Hi ,

    I am using Appian contact management application tree browser code for creating org chart.but i m facing an issue when updating a contact by finding a contact using user picker and then trying to update the contact.

At that time i m getting below mentioned error

Appian code :

load(
local!newContact: 'type!{urn:com:appian:recipes}CM_CustomerContact'(),
local!noContacts: rule!CM_noContactDataExists(),
/* Adds text-based node to the root that allows user to add a supervisor to contacts without a supervisor */
local!path: {cons!CM_ADD_ROOT_CONTACT_TEXT, if(isnull(ri!path), {}, ri!path)},
/* Used in contact finder picker */
local!foundContact: ri!targetContact,
with(
local!pathLength: length({local!path}),
local!selectedNode: index(local!path, local!pathLength),
local!actionTaken: not(isnull(ri!goTo)),
local!newContactSelected: not(rule!CM_isCustomerContact(local!selectedNode)),
local!workStarted: if(
local!newContactSelected,
/*
Checks to see if the user has added any values. The user does not set the supervisor,
so our check needs to ignore the supervisorId.
*/
local!newContact <> 'type!{urn:com:appian:recipes}CM_CustomerContact'(supervisorId: local!newContact.supervisorId),
and(
local!actionTaken,
ri!targetContact <> cast('type!{urn:com:appian:recipes}CM_CustomerContact', local!selectedNode)
)
),
a!formLayout_17r1(
firstColumnContents: {
a!sectionLayout_17r1(
label: "Reporting Structure",
isCollapsible: true,
firstColumnContents: {
rule!CM_contactFinder(
path: local!path,
targetContact: ri!targetContact,
foundContact: local!foundContact,
root: cons!CM_ADD_ROOT_CONTACT_TEXT
),


a!hierarchyBrowserFieldTree(
pathValue: local!path,
/* Numbers outline what happens when a user clicks on a "Add New" node */
pathSaveInto: if(
/*
1. If the user has started editing a new contact or updating an existing contact,
we block navigation by setting the pathSaveInto to null
*/
or(local!workStarted, local!actionTaken),
null,
/*
2. If work is NOT in progress, always save the path. We need to save the path
for the component to respond to a user's click.
*/
{
local!path,
/*
3. The add new root is dropped from local!path and the result is saved to ri!path.
ri!path is a CustomerContact list that cannot hold the text value of a new root contact node
*/
a!save(ri!path, ldrop(local!path, 1)),
with(
local!selectedNode: rule!CM_getSelectedValue(local!path),
/*
If a contact is clicked
save the selected node as to the "targetContact" and "foundContact"
Otherwise, a new contact node is clicked. Therefore:
Set the new contacts supervisorId to the value above it in the path
*/
if(
rule!CM_isCustomerContact(value: local!selectedNode),
a!save(
{
ri!targetContact,
local!foundContact,
/* save!value is local!selectedNode. Save the image of the selected node */
a!save(ri!newOrUpdatedImage, save!value.imageId)
},
local!selectedNode
),
/*
4. `local!newContact.supervisorId` is updated with what will be the new node'ssupervisor.
We update the `local!newContact.supervisorId` so that the new contact form below
the hierarchy browser tree shows the correct supervisor
*/
{
a!save(
local!newContact.supervisorId,
rule!CM_multiIndex(local!path, {length({local!path}) - 1, "id"}, null)
),
/*
5. Drop add new node from the path.
ri!path is a CustomerConact list and cannot hold the text value of a new contact node.
*/
a!save(ri!path, rdrop(local!path, 1)),
a!save({ri!targetContact, local!foundContact}, null),
a!save(ri!newOrUpdatedImage, null)
}
)
)
}
),
nextLevelValues: {
if(
rule!CM_isCustomerContact(fv!nodeValue),
rule!CM_getSubordinatesFromCustomerContact(contact: fv!nodeValue),
rule!CM_getContactsWithNoSupervisor()
),
/* Add text-based node to allow users to add a contact at this level */
cons!CM_ADD_CONTACT_TEXT
},
nodeConfigs: if(
rule!CM_isCustomerContact(fv!nodeValue),
rule!CM_customerContactNodeConfigs(contact: fv!nodeValue),
rule!CM_textBasedContactBrowserNode(
text: cons!CM_ADD_CONTACT_TEXT,
icon: a!iconIndicator("ADD"),
isDrillable: and(fv!nodeValue = cons!CM_ADD_ROOT_CONTACT_TEXT, not(local!noContacts))
)
)
),
if(
/* Hide buttons if a new contact is selected or an action has been taken */
or(
local!newContactSelected,
local!workStarted,
local!actionTaken
),
{},
a!buttonLayout(
primaryButtons: {
a!buttonWidget(
label: "Update Contact",
value: cons!CM_CUSTOMER_CONTACT_ACTIONS[1],
saveInto: ri!goTo
),
a!buttonWidgetSubmit(
label: "Delete Contact",
value: cons!CM_CUSTOMER_CONTACT_ACTIONS[2],
saveInto: {
/* 1. ri!goTo is updated to take the process flow through the correct path */
ri!goTo,
/*
2. The root node is removed from the path and the deleted value is removed,
allowing us to bring the user back to the supervisor of the deleted contact.
*/
a!save(ri!newOrUpdatedImage, null),
/* 3. The root and target contact are removed from the path */
a!save(ri!path, rdrop(ldrop(local!path, 1), 1))
}
)
}
)
)
}
),
if(
local!newContactSelected,
{
rule!CM_contactInformationSection(
contact: local!newContact,
label: cons!CM_ADD_CONTACT_TEXT,
newOrUpdatedImage: ri!newOrUpdatedImage,
path: ri!path
),
a!buttonLayout(
primaryButtons: {
a!buttonWidgetSubmit(
label: "Create New Contact",
style: "PRIMARY",
value: local!newContact,
saveInto: {
ri!targetContact,
a!save(ri!goTo, cons!CM_CUSTOMER_CONTACT_ACTIONS[1]),
a!save(ri!rootContactAdded, local!selectedNode = cons!CM_ADD_ROOT_CONTACT_TEXT)
}
),
a!buttonWidget(
label: "Cancel New Contact",
disabled: not(local!workStarted),
saveInto: {
a!save(local!newContact, 'type!{urn:com:appian:recipes}CM_CustomerContact'()),
/* Remove the "Add New" from the path when they hit cancel if it's not the root */
if(local!pathLength > 1, a!save(local!path, rdrop(local!path, 1)), null),
a!save(ri!path, rdrop({ri!path}, 1)),
if(
rule!CM_isCustomerContact(rule!CM_getSelectedValue(local!path)),
a!save(ri!targetContact, rule!CM_getSelectedValue(local!path)),
null
),
a!save(
ri!newOrUpdatedImage,
index(ri!targetContact, "imageId", null)
)
}
)
}
)
},
{
rule!CM_contactInformationSection(
contact: ri!targetContact,
isDisabled: not(local!actionTaken),
label: "Update " & rule!CM_displayContactFullName(ri!targetContact),
newOrUpdatedImage: ri!newOrUpdatedImage,
path: ri!path
),
if(
not(local!actionTaken),
{},
a!buttonLayout(
primaryButtons: {
a!buttonWidgetSubmit(
label: "Confirm Update",
style: "PRIMARY"
),
a!buttonWidget(
label: "Cancel Update",
value: null,
saveInto: {
ri!goTo,
a!save(ri!newOrUpdatedImage, ri!targetContact.imageId),
a!save(ri!targetContact, local!selectedNode)
}
)
}
)
)
}
)
},
buttons: a!buttonLayout(
secondaryButtons: {
a!buttonWidgetSubmit(
label: "Close",
skipValidation: true,
confirmMessage: if(
local!workStarted,
"Are you sure you want to continue? All contact update or new contact information will be lost.",
""
),
value: cons!CM_CUSTOMER_CONTACT_ACTIONS[3],
saveInto: ri!goTo
)
}
)
)
)
)

Kindly request anyone to provide solution for this issue.

Thank you.