[Solved] Subscript used on non-accessible variable

[KickStarter15]

Hi Experts,

Hope everyone had a great day😄...

I have a small problem right now Experts concerning this error "Subscript used on non-accessible variable". All I want to know is how can I skip this error type in my For... loop... Next... code and should continue looping until end.

My error:
D:\WorkDIR\Tool\ArchivingTool.au3" (101) : ==> Subscript used on non-accessible variable.:
For $j = 1 To $aLevel2_SubFolders[0]
For $j = 1 To $aLevel2_SubFolders^ ERROR

 

My code:

For $j = 1 To $aLevel2_SubFolders[0]
    _DirRemove($aLevel2_SubFolders[$j], 1)
    GUICtrlSetData($Progress1, $j)
Next

If I'm not mistaken, the loop stop's because the variable is equals to 0 already, and no longer continuing the loop. I tried adding "If @error then ContinueLoop" but I think it's not the right one because still stop's the loop.

From the path declared, I have 23 or more subfolders to remove from a parent folder and some were excluded in removing (was declared in separate line of my code). The problem is, when my first parent folder already has no subfolder/s to remove then my For loop stop running and flagged this error. Can I do something on that? I mean, I need to continue my deletion of subfolders even if the first parent folder is already empty or was already deleted.

Please let me know if you need more explanation, thanks in advance Experts.

 

KS15

Edited November 19, 2019 by KickStarter15

[Danp2]

Verify the variable is an array before running this section of code. See IsArray entry in the help file.

[KickStarter15]

@Danp2, Yes, but if the variable is not an array then...? can the loop continue? please advise.

 

[Danp2]

If it's not an array, then you need to skip that section of code to avoid the subscript error. If that doesn't meet your needs, then perhaps you need to take a step back to determine if you are attempting to fix a symptom rather that the actual problem (ie: what command is creating the array and why is it failing to do so on some occasions?)

[KickStarter15]

@Danp2, Yup, skipping is the way and what I did is writing a dummy array just to proceed with the loop. Well thanks for sharing IsArray indeed it solved my problem🙂.

[Nine]

You can use ternary op like this :

For $j = 1 To IsArray($aLevel2_SubFolders) ? $aLevel2_SubFolders[0] : 0
    _DirRemove($aLevel2_SubFolders[$j], 1)
    GUICtrlSetData($Progress1, $j)
Next

 

[Musashi]

@KickStarter15 :

For completeness only : Could you please post an executable minimal script that causes the problem. This may help to identify and solve it as suggested here :

59 minutes ago, Danp2 said:

... to determine if you are attempting to fix a symptom rather that the actual problem (ie: what command is creating the array and why is it failing to do so on some occasions?) 

 

@Nine : Nice usage of the ternary operator.

[KickStarter15]

@Nine, Thanks, it's working👍.