Big Bug ! App Inventor is deleting part of the code after closing and reopening the project

[Peter]

@David_S

"text box" instead of text field?

text box and text field are the same. App Inventors official name is "string block".

[Juan_Antonio]

Delete first char y try again

[Peter]

Good eyes.

[Peter]

Just tested it. The character/escape code thingy is preventing the text box from being copied to the backpack.

[David_S]

Dear Peter,

IT SOLVED THE ISSUE

Anyway I created text box to be sure.

Then I removed the special character from the beggin.

After that i tryed to save and close.

After reopening that, it works.
I tryed aso to export aia and re import.

It works also!!!

The character was part of the zpl label. Anyway after deleting it it is still working.

Thank you very much for your time and great support !!!
David

[Peter]

@Juan_Antonio found the solution. Still like to know what "character" caused the problem. This is something that shouldn't happen.

[Juan_Antonio]

ascii 197 = ┼

ascii197hereCT~~CD,~CC^~CT~ ^XA ~TA000 ~

[Juan_Antonio]

@Peter

Perhaps is this

ascii 16 = DLE

but when i unzip the .aia i get this

[Peter]

I tested DLE and that wasn't it.

- Data Link Escape: U+0010

But I also think it should be one of the C0 controls.

Basic Latin

[Juan_Antonio]

It's 16 = DLE, but when you copy paste
" Click to copy and paste symbol" is converted to: 238 128 144

[Peter]

Again good catch.

[Juan_Antonio]

[Peter]

The data link escape character (DLE) was intended to be a signal to the other end of a data link that the following character is a control character such as STX or ETX.

Furthermore, what is data link escape? data link escape - Computer Definition A communications control character that indicates that the following character is not data, but a control code.

[ChrisWard]

It's a Byte Order Mark isn't it?

[Peter]

Had to search that also

The byte order mark (BOM ) is a particular usage of the special Unicode character, U+FEFF BYTE ORDER MARK, whose appearance as a magic number at the start of a text stream can signal several things to a program reading the text:[1]

[Juan_Antonio]

@David_S 's app is interesting because it manages to send control characters to a Zebra Bluetooth printer.

zplii-pm-vol2-en.pdf

[ABG]

(added to FAQ)

FAQ Section: Printing

ESC/POS Simple Converter Extension - Daniel K. Experiences with the Jimdo.com ESC/POS Converter - @Bob_Holden [PAID] Thermal Printing extension (Bluetooth/Network) - mmnettime Printing in ZPL from text blocks - David_S, Juan_Antonio, Peter, ChrisWard Reference Material Epson ESC/POS(R) Reference Manual Defunct Image Print Extension - ILoveThunkable (missing)

[ABG]

(added to FAQ)

FAQ Section: Blocks Editor

Typeblocking video demo - MIT Blocks Editor needs Browser Popups for Typeblocking and Downloaded Blocks Images Finding hidden error or warning icons using Chrome Web Browser Inspector - TFO Searching in the Blocks Editor - Ghica Sharing Blocks Though github.com - ABG Can't Select or Drag some blocks because of AntiVirus Deep Nesting distorts Blocks Editor; Use mutators Too Many Blocks - ABG How to poison the Blocks Editor using Printer Codes in Text Blocks - Juan_Antonio, David_S Brows…

[ewpatton]

This is a known issue, and is due to the fact that while browsers will gladly emit XML that contains certain unallowed characters, they will refuse to parse that XML on the way back in. We do have a potential workaround in the pipeline and I'll see what we can do about getting that into the next release.