Cheat Engine

DTeCH

Access Violation, & attempt to call global 'close' (a nil value) when I try to close the trainer.

Hello again guys. Smile

This problem has been haunting me for months. It's really getting to me. Foul language + TAX has been coming out of my mouth because of it.

I have been developing since 1988, & have gained a level of patience that was never in me to begin with, due to the continual attempts to blame the language of being super buggy, only to find months later (after I've calmed down, & gave up on the project) that it was a simple overlooked DOT in the wrong place, or something declared with a Capital letter in it, but the rest of the code calls it without the Capital, & causes it to not be recognized.

Simple things like that has placed bags under my eyes over the years. So... I've learned to be patient, & resume working until I can spot the obvious error later by not even looking for it. Smile

However, this LUA thing is getting me to the point of cursing like a spoiled little school girl. Razz

My Trainer project has gone from v1.0 to v1.53 (54 releases). Each version has it's own folder which includes the xxx.CT, xxx.CETRAINER, xxx-Plain.CETRAINER, xxx-32.exe, & xxx-64.exe of that specific version.

I have been comparing like crazy to try to locate the error location to no avail.

I started the project with CE v6.2, & since maybe v1.20 of my trainer, I switched to CE v6.3

My issue started when I added the customeSound scripts from mgr.inz.Player located forum.cheatengine.org/viewtopic.php?t=565651 .

The scripts work flawlessly, but now these errors won't piss off, & let the trainer close as usual. What confuses me is the fact that it did close several times normally when I was working on it from a copy of v1.44 of the trainer renamed to v1.53 Alternate.

While re-writing it to match v1.53 I quickly realized that it compiled, & ran + closed as usual with the scripts from mgr.inz.Player in place from the early stages of the re-write, however, the problem seemed to spring up when I was done with the re-write, & left the close button, & Form's OnClose event for last due to the fact that these edits were what caused my issues from the original v1.53 project, & added the following to them:

Dark Byte · Posted: Sat Oct 05, 2013 3:04 am Post subject:

Use print to make your own log
Does your lua script contain the customsound code? And if not, is it launched eventually another way?

Also, run the lua script in the .ct instead of .cetrainer or.exe to get a better view on what could go wrong

And if you post the unencrypted .cetrainer or even .ct we could check what goes wrong

DTeCH · Posted: Sat Oct 05, 2013 6:36 am Post subject:

Thanks Byte Smile

Looks like the customSound script calls an injected instance of winmm.PlaySoundA that some how locks the trainer thread. When a simple MouseUp, or MouseDown sound plays, the OnClick event gets ignored... which is strange because it worked before. Might be a memory bug, or some other code execution timing related issue, because it doesnt happen every single time.

My closing problem went away when I removed both the MouseUp, & MouseDown customSound sound effects for the close button. Had to do the same for the Attach to Browser Button. Strange.

Really wanted this trainer to follow in the SFX footsteps of my BOT tools... at least in appearance, & effects Smile

LUA is seriously limited, but I'm going with it because it works nicely with Cheatengine, but i can't seem to find any code samples for VS.NET. I hate that my browser game trainers are single threaded, & blocking... freezing the GUI with each call to a function that takes a few moments to complete. I used Teamviewer a few minutes ago to run the trainer on both a 64 bit system, & a low memory single core laptop in Puerto Rico, & South Dakota which both took over 10 minutes to attach to Google Chrome, SRWare Iron, Comodo Dragon, CoolNovo, & Chromium.

Threading is so easy in VS.NET, & really makes me feel like I'm going backwards instead of forwards if I don't use it. Razz

If there are any code bits laying around to import a Cheatengine.dll of some type, & use it from within C#.net, or VB.NET, I'd really love to know about them. Even an alternative set of calls to mimic what you have achieved with cheat-engine from within VS.NET to be able to use the calling convention similar to the trainer maker's LUA atmosphere.

I don't have the ambition to write one from scratch just for free trainers.

Thanks again for the print info. I'm learning more, & more here each day. Very Happy

Dark Byte · Posted: Sat Oct 05, 2013 7:19 am Post subject:

createNativeThread(function) executes the given function in a different thread

Note though that i don't think that the customsound code is thread safe, so you can only use one thread to play sounds

mgr.inz.Player · Posted: Sat Oct 05, 2013 7:21 am Post subject:

Just post your CT file so we could check it.

About sound,

DTeCH · Posted: Sat Oct 05, 2013 8:55 am Post subject:

I'm experimenting with createNativeThread(function) with, & without customSound. Very Happy

Yea, the customSound seemed to stop playing the previous .wav the moment another call to it is made, but I'm now experimenting with createNativeThread(function). Will let you guys know the result. Razz

Thanks again for the quick responses.

mgr.inz.Player · Posted: Sat Oct 05, 2013 9:36 am Post subject:

OK, as you want.

"Access Violation, & attempt to call global 'close' (a nil value) "
read this one:
http://forum.cheatengine.org/viewtopic.php?t=566876
(use lua file from recent post - link)