Bad arguments to elements

[C-J]

Hi, I am making a simple chat app using BLE connected to an embedded data modem. However when I try to assign message and username to my listview called Message_list i receive error "Bad arguments to Elements", "The operation Elemenets cannot accept the arguments:,["Bob : Hello world"]. I have disabled the block that causes my problem for you to easily find it. Fingers crossed that someone of you experts can help me out.

[ABG]

You are trying to do in one step what needs three steps:

• Copy the MessageList.Elements into a list variable (Call it Messages)
• Add the global chatmessages to that list using the list add block
• Copy the Messages variable back into MessageList.Elements

[C-J]

Hi, Tnx for fast response. Not sure if I fully understood. Are you meaning like the following?

[ABG]

See this sample:

https://groups.google.com/g/mitappinventortest/c/II_RlElGddU/m/J0q_E-2rAwAJ

[C-J]

OK. Will check your link. Meanwhile I upload my original .aia file with the problem as reference.
BLE2_11_Nov (1).aia (193.5 KB)

[C-J]

Are you referring to the following in yellow specifically from your link? My problem is driving me craaazy

[ABG]

yes

(draggable)

[C-J]

Great. Will give it a try later today. A big thank you for support. /C-J