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Filter on Business Process Flow Step

Hello,

I have the following JS web resource script where I am attempting to add a filter to the Account lookup field on the first stage of my business process flow on the Lead form, but it does not seem to work when testing it out on the form. In my console I can see the PreSearch event handler is being added but the filtering isn't being applied so I assume something is going on with the addPreSearch function. Any help is appreciated, thank you.

function filterAccountLookup(executionContext) {
    var formContext = executionContext.getFormContext(); 

    // Get the Lookup control for the lead's account field 
    var accountLookup = formContext.getControl("parentaccountid");
    console.log('accountLookup: ', accountLookup);

    if (accountLookup) {
        // Add PreSearch event handler for the lookup field
        console.log('Adding PreSearch event handler');

        accountLookup.addPreSearch(function () {
            // Define filter condition
            console.log('Filter defined');
            var filter = "<filter type='and'>" +
                            "<condition attribute='crdc5_type' operator='neq' value='236000002' />" +
                        "</filter>";

        // Apply the filter to the lookup field
        console.log('Applying custom filter to lookup control');
        accountLookup.addCustomFilter(filter, "account");
        });
    }
}

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