pop up lookup

Yeah, I would like to know that too!

If you're asking about calling a popup from a business process, then there is no such a functionality in the out-of-the-box system.

It's possible to create such a functionality with code. This is the way on how to call a page method from a business process.

The code in the process

 

//Usings

using Terrasoft.Configuration;
using Terrasoft.Messaging.Common;
using Newtonsoft.Json;

//Code

public void SendMessage() {
    string senderName = "TestPopup";
    string message = JsonConvert.SerializeObject(new {
        RecordId = Guid.NewGuid(),
        Name = "Some name"
    });
     
    // For all users
    //MsgChannelUtilities.PostMessageToAll(senderName, message);
     
    // For current user
    var userConnection = Get<UserConnection>("UserConnection");
    MsgChannelUtilities.PostMessage(userConnection, senderName, message);
     
    // For specific user with sysAdminUnitId
    /*IMsgChannel channel = MsgChannelManager.Instance.FindItemByUId(sysAdminUnitId);
    if (channel != null) {
        var simpleMessage = new SimpleMessage() {
            Id = sysAdminUnitId,
            Body = message,
            Header = {
                Sender = senderName
            }
        };
        channel.PostMessage(simpleMessage);
    }*/
}

Frontend

define("CommunicationPanel", ["terrasoft", "LookupUtilities"],
	function(Terrasoft, LookupUtilities) {
		return {
			messages: {
				"CardProccessModuleInfo": { "direction": "subscribe", "mode": "ptp" },
				"GetHistoryState": { "direction": "publish", "mode": "ptp" }
			},
			attributes: {},
			methods: {
				init: function() {
					this.callParent(arguments);
					Terrasoft.ServerChannel.on(Terrasoft.EventName.ON_MESSAGE, this.onMessageReceived, this);
				},
				//probably onMessage
				onMessageReceived: function(sender, message) {
					if (message && message.Header && message.Header.Sender === "TestPopup") {
						//var result = this.Ext.decode(message.Body);

						var contactFilters = Terrasoft.createFilterGroup();
						var config = {
							entitySchemaName: "Contact",
							mode: "processMode",
							captionLookup: "Contact lookup",
							multiSelect: false,
							columnName: "Name",
							filters: contactFilters,
							commandLineEnabled: true
						};
						var handler = this.handler;
						LookupUtilities.OpenLookupPage(this.sandbox, {config: config, handler: handler}, this, null, false);
					}
				},
				handler: function() {
					//run process here
					/*
					ProcessModuleUtilities.executeProcess({
						sysProcessName: processName
					});*/
				},
				destroy: function() {
					this.Terrasoft.ServerChannel.un(Terrasoft.EventName.ON_MESSAGE, this.onMessage, this);
					this.callParent(arguments);
				}
			},
			diff: []
		};
	});

Please note that you'll need to modify the OpenLookupPage method and draw a lookup frame manually.