Fatal Error! Failed to execute script Appstudio (again)

I got this error after trying to go back from version 8 to an old version 7.

The field in the registry
“HCU\Software\NSBasic\App Studio”
suggested in an old post doesn’t exist on my pc (I use windows 10).

I tried also with ccleaner to clean the registry but the error is still blocking the execution.

Try this:

https://wiki.appstudio.dev/Solutions_to_Common_Problems#How_can_I_do_a_complete_uninstall.3F

I tried again by removing the residual folder after uninstalling, i also erased every recurrence of AppStudio in my registry but the solution didn’t work for me.
(instead I can install and start the version 8.4)

Did you do ALL the steps in the link I gave you?

yes.
i have eliminated from regedit also all the fields containing appstudio, but there is only this recurrence left, that i couldn’t remove:

This field HCU\Software\NSBasic\App Studio doesn’t exist in my registry on windows 10.
Version 7 doesn’t start because it’s immediately blocked by the error.

if it can help, this is the log file:

2020-11-06 23:00:17,286 - main - INFO - ****************************************
2020-11-06 23:00:17,286 - main - INFO - * Welcome to NSB/AppStudio 7.4.0.0.0b1
2020-11-06 23:00:17,286 - main - INFO - * Starting at level: 10
2020-11-06 23:00:17,286 - main - INFO - * Install Dir: C:\Program Files (x86)\NSB AppStudio
2020-11-06 23:00:17,286 - main - INFO - * Frozen: True
2020-11-06 23:00:17,286 - main - INFO - ****************************************
2020-11-06 23:00:17,286 - main - INFO - * Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:42:59) [MSC v.1500 32 bit (Intel)]
2020-11-06 23:00:17,286 - main - INFO - * wxPython 3.0.2.0 msw (classic)
2020-11-06 23:00:17,286 - main - INFO - * ecdsa 0.13
2020-11-06 23:00:17,302 - main - INFO - * jsbeautifier 1.5.4
2020-11-06 23:00:17,302 - main - INFO - * paramiko 1.15.2
2020-11-06 23:00:17,302 - main - INFO - * pycrypto 2.6.1
2020-11-06 23:00:17,302 - main - INFO - * pysftp 0.2.8
2020-11-06 23:00:17,302 - main - INFO - * PyYAML 3.11
2020-11-06 23:00:17,302 - main - INFO - * requests 2.10.0
2020-11-06 23:00:17,302 - main - INFO - * six 1.10.0
2020-11-06 23:00:17,302 - main - INFO - * verlib (no version in module)
2020-11-06 23:00:17,302 - main - INFO - * Native OpenSSL 1.0.2j 26 Sep 2016
2020-11-06 23:00:17,302 - main - INFO - * Python OpenSSL 1.0.2h 3 May 2016
2020-11-06 23:00:17,302 - main - INFO - * ndg.httpsclient (no version in module)
2020-11-06 23:00:17,302 - main - INFO - ****************************************
2020-11-06 23:00:17,332 - root - ERROR - An exception has occurred!
Traceback (most recent call last):
File “AppStudio.py”, line 414, in
File “site-packages\wx-3.0-msw\wx_core.py”, line 8628, in init
File “site-packages\wx-3.0-msw\wx_core.py”, line 8196, in _BootstrapApp
File “AppStudio.py”, line 179, in OnInit
File “Settings.py”, line 372, in getInstance
File “Settings.py”, line 103, in LoadSettings
IndexError: list index out of range

You need to remove the specific key referenced in the article:

Computer\HKEY_CURRENT_USER\Software\NSBASIC\App Studio

Note the space in App Studio. It was called that when it was still in alpha and never got changed.

i removed also the “App Studio” (with the space) and it works, thanks