Getting system messages, "Bad arguments to", while using WIFI and BLE

[Baran_Galocy]

[SteveJG]

The guest system does not want your app connecting.

Apps sometimes can IGNORE 'error' messages if you use the ErrorOccurred block empty (with no Blocks). In this instance , that probably is not the issue but you can try an empty ErrorOccured

Elsewhere in your code do you use a Format sstatement that the guess system does not like?

You might google bad arguments error code to see if you can find a suitable error number.

[Taifun]

Check your blocks for the format as decimal block... how are you using it and what is the first argument in that case? Where does the NA come from?

And check your blochs for the multiplication block... you only can multiply numbers, but not an empty string... see the error message... as you can see, the first argunent is an empty string...

Taifun

[ABG]

How to Read and Understand a Runtime Error Message

We get lots of posts with run time error messages that look like [image] How can we extract useful information from error messages like that? Here's how: [Sample error message annotated] The name of the block is in the error message, between "The operation" and "cannot". In this case, the operation is "select list item". To proceed further, we need to look at a sample of that type of block, to see what it wants as arguments (the stuff that goes into its sockets.) This sample was pulled o…

[Baran_Galocy]

Good Morning,

Perhaps the attached block will reveal something to you that I do not grock? This procedure block is called in the course of connecting to WIFI. I think the "2" is the stated number of places but I cannot find a "NA" anywhere. There are no other "format as decimal" blocks outside of specifically called procedures.

Also, can you tell me why the program is identifying an operation as "*"? That is not very helpful. I am searching my code for a random ".24."

[Taifun]

It looks like one of these blocks return NA

@Baran_Galocy

Also, can you tell me why the program is identifying an operation as "*"?

• this is a multiplication block

So somewhere in your blocks you are multiplying an empty string with 0.24

Use the companion app and Do it to debug your blocks, see also tip 4 here App Inventor: How to Learn | Pura Vida Apps
see also Live Development, Testing, and Debugging Tools

FAQ Section: Debugging

Introductory Testing techniques, including Do It - MIT Sample Connect -> Companion sequence - @ABG How to Read and Understand a Runtime Error Message - @ABG Common Runtime Errors - @TimAI2 Advanced Do It' to view procedure results, event arguments and local variables How to run Logcat How to use Do It in a loop Screen1.ErrorOccured message numbers SteveJG monster list of things you should not do How to show raw responseContent from your app when debugging - TimAI2 Video of copying Do…

Taifun

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Trying to push the limits! Snippets, Tutorials and Extensions from Pura Vida Apps by Taifun.

[Taifun]

@Taifun

It looks like one of these blocks return NA

check the value before trying to format as decimal
this is also called data validation
and if the value is NA, then just display "Sorry, value is not available"

Taifun

[Baran_Galocy]

Right! Thank you so much. Exactly how much coffee do I need to recognize "*" as an operation?!

[TIMAI2]

[Baran_Galocy]

FOUND IT!!! [Gratuitous self-patting of back - like I was searching someone else's code;]. I laid out a couple of questions on the image because I do not see how the program fails without checkbox 24 being diddled.

Also, does NA mean "not available" or are we speaking about something replicated from my code? It surely isn't reading my "Not Found" labels are interpreting them as "NA." That is bordering on magic thinking.

I guess my real bottom line is to follow the previous advice of setting up an empty error block. It seems simple enough to say that if no WIFI is available, skip this/these block(s), so maybe I will follow down that rabbit hole.

Thanks, again, for pointing out that an asterisk was an operation;).

[Baran_Galocy]

Greetings,

Thank you for that tutorial on error messages. They make a lot more sense to me now.

[Baran_Galocy]

Does this look familiar? "Empty Textbox (when used for calculations)"

This is a runtime error possibility you mentioned elsewhere in the AI2 Universe. I went ahead and pre-loaded that text label with "0" because I think it is behaving the same way.