Nuke: Wrong encoding causing Unicode characters to change on each script save/open

[jeangjenq]

Running version
3.14.6
Windows 10 22H2

Describe the bug
Nuke is saving/opening script with the wrong encoding, causing unicode characters to more than double up in characters on each save/open. Eventually exponentially doubling script's filesize on each save.

To Reproduce
Steps to reproduce the behavior:

1. Make sure you're running an installed version of OpenPype on Windows. This is because cx_Freeze is involved in this.
2. Open an empty Nuke via OpenPype
3. Paste this node

NoOp {
 inputs 0
 name NoOp1
 xpos 292
 ypos -224
 addUserKnob {20 User}
 addUserKnob {26 asd l "" +STARTLINE T ü}
}

4. Look at pasted node, make sure the text knob on it says ü
5. Save script via OpenPype.
6. Close and reopen script, ü is now ü.
7. Change is reflected in opening script in a text editor.

Expected behavior
Created unicode text should stay as it is, not change into other characters.

Screenshots
Before:

After:

On a rather heavily affected knob (After many save/open):

Desktop (please complete the following information):

• OS: Windows 10 22H2
• Host: Nuke 13.1v2

Additional context

• The unicode character change seems consistent with change of encoding from UTF-8 to Windows-1252.
• Problem does not exist on linux, or while running from tray on Windows.
• We traced the problem to cx_Freeze is packaging its own version of TK and TCL, and applying environment variables to override its usage.
• Installed version of OpenPype comes with these environment variable override:

TCLLIBRARY:C:\Program Files (x86)\OpenPype\3.14.0\lib\tkinter\tcl8.6
TKLIBRARY:C:\Program Files (x86)\OpenPype\3.14.0\lib\tkinter\tk8.6

• Adding the below environment override to Nuke settings in OpenPype settings resolve this issue temperorily.

{
    TCL_LIBRARY:""
    TK_LIBRARY: ""
}

[cuID:OP-4557]

[iLLiCiTiT]

Thanks for reporting the issue and resolving it at the same time.