IOSError 24 on stepping past file open

Targets macOS
1

I am using 2022 R3.

I keep getting this error on a call of a subroutine whose sole job is to open a text file and return it. The file definitely exists and is also true in the debugger.

Whenever I step into this one section of code for this one file, I get this error. Yes not any where else but this one.

Var rCardtis As TextInputStream
Var fa As FolderItem

If fa.Exists Then
rCardtis = TextInputStream.Open(fa)//Error 24 at this line
End If

When I ran Error 24 in Terminal this is what I got:

Mac OS error 24 (dsNoPk7): package 7 not present

Any suggestions?

2

Except that itā€™s an IOError 24 which is ā€œToo Many Open Filesā€

3

I agree. That is very confusing. I know that too many files is not possible since I keep only one file at a time open. Also the file is on the hard drive.

4

The question is ā€œIOSError24 on stepping past file openā€. But yoy tell that you get this when running on MacOS.

So what is the correct OS ? We need to know to help you.

Thanks

5

The code you posted makes a NOE at fa.exists because fa is nil.

6

If Not fa = Nil And fa.Exists Then

7

Thatā€™s gotta be a typo

8

Too many files open is for the whole system, not just your app. If you look at that link I sent you, thereā€™s a suggestion about temporarily increasing the limit to check.

Also the file is on the hard drive.

Right. Too many files open on any drive connected to your system.

9

Thanks Greg

Code Correction

If f <> Nil And f.Exists Then

The example on Stasckexchange has this

ulimit -n 4096

In the LR us this example

ulimit -c unlimited

So I think the -n is related to ā€œFiles Openā€, but I donā€™t see how I can put this in Code.
Where and how do I enter this in code?

10

On the CLI ulimit you are modifying the shell session limits. Your App gained its limits from the launcher, BEFORE. So I guess you will need to change your launcher limits, and relaunch your app.

To see your current limits run:

launchctl limit maxfiles

To change it to the max run:

sudo launchctl limit maxfiles 10240 10240

The second number is the soft limit, and can be bigger than the hard limit, but why would we want that?

11

Butā€¦ Why are you letting so many files left open at once? Maybe your app design could need a rethinking?

1 Like
13

Thatā€™s the code in StackExchange. I guess I didnā€™t make it clear enough.

14

So you are reporting an unreal problem of a random code from StackExchange? Ok. Come back when you have some real problem. :man_shrugging:t2: But if you HAD something like that, the solutions are provided. And the best one probably would be an app redesign. :wink:

15

Please read the whole post before you defame someone. Greg pointed out the exchange long after I posted my question.

1 Like
16

I ran it in Terminal and the response is

maxfiles 256 unlimited

I am done looking at this

1 Like
17

As expected.

But what if you run:

sudo launchctl limit maxfiles 999 unlimited

And only after you run

launchctl limit maxfiles

18

I see you are running some ā€˜oldā€™ macOS, because ā€œunlimitedā€ string is not allowed as response anymore and the ā€œkeywordā€ equals to 10240 in this context, currently, for compatibility reasons.

Also, 256 was increased in newer macOS versions.

19

macOS Big Sur. 11.7.8

Thanks
Iā€™m done with chasing this

20

No need to chase. You just need to run what I explained, but Ok.

21

I ran the line in terminal and it no longer gave the error when I stepped thru.

I ran the above line and it was back to 256. Maybe it just wanted to noticed, but it no longer fails.