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Board index FiveWin for Harbour/xHarbour Getting (0xc000007b) Error upon launch.
Posts: 408
Joined: Sun Nov 06, 2005 03:55 PM
Getting (0xc000007b) Error upon launch.
Posted: Fri Apr 17, 2026 03:58 PM

I have moved the source to several apps to a new workstation and one of the apps gets this error right when I launch. I am thinking it might be related to a lib I am using cUrl. Are there a few things I need to have in line to make sure this works? I have copied all of my directories FWHarbour, bcc7, cUrl, Harbour, and the application directory. There are no linker errors. Using the same .mak file on both workstations. There is a libcurl.dll in the application directory.

Thanks,

Byron Hopp

Matrix Computer Services
Posts: 44158
Joined: Thu Oct 06, 2005 05:47 PM
Re: Getting (0xc000007b) Error upon launch.
Posted: Fri Apr 17, 2026 07:45 PM

That error means that you are mixing 32 and 64 bits code.

In example: a 64 bits DLL for a 32 bits app

regards, saludos

Antonio Linares
www.fivetechsoft.com
Posts: 408
Joined: Sun Nov 06, 2005 03:55 PM
Re: Getting (0xc000007b) Error upon launch.
Posted: Fri Apr 17, 2026 10:46 PM

It is a new workstation / laptop. Does th4e 32 bit app look in System32 first then else where if it doesnt find what it is looking for? Is there a wey to tell which dll it is having a problem with. I was off on a tangent thinking it was related to cUrl, but it turned out I have another app that does not use cUrl and it gets the same error.

Thanks,

Byron Hopp

Matrix Computer Services
Posts: 408
Joined: Sun Nov 06, 2005 03:55 PM
Re: Getting (0xc000007b) Error upon launch.
Posted: Fri Apr 17, 2026 11:49 PM

Is the rogue dll in my application directory, or where do I look. I am running WinMerge to see where I might have different dll's. Is there a way for Windows to identify which dll's it is using. I don't remember having this issue the last time I bought a laptop (11 years ago), it was time.

Thanks,

Byron Hopp

Matrix Computer Services
Posts: 44158
Joined: Thu Oct 06, 2005 05:47 PM
Re: Getting (0xc000007b) Error upon launch.
Posted: Sat Apr 18, 2026 03:51 AM

Dear Byron,

In these cases I have found Claude Code as the best help to find the problem and fix it. :idea:

regards, saludos

Antonio Linares
www.fivetechsoft.com
Posts: 408
Joined: Sun Nov 06, 2005 03:55 PM
Re: Getting (0xc000007b) Error upon launch.
Posted: Sat Apr 18, 2026 06:02 PM

Thank you Sir,

I tried Perplexity where Claud is one of its models. I will try Claud directly and give it a shot.

I'll let you know.

Thanks,

Byron Hopp

Matrix Computer Services
Posts: 408
Joined: Sun Nov 06, 2005 03:55 PM
Re: Getting (0xc000007b) Error upon launch.
Posted: Sun Apr 19, 2026 06:53 AM

Little update. I copied all of the dll's that were missing in the c:\windows\syswow64 directory on my new laptop from my old system (both running the same version of windows) and the problem went away. Probably not the best way, but is there an installer for bcc7 Embarcadaro 7.0.5521.35095 that might solve this problem? I have another new system and I will try just the 4 files mentioned in claude and see it that works.

Thanks,

Byron Hopp

Matrix Computer Services
Posts: 8515
Joined: Tue Dec 20, 2005 07:36 PM
Re: Getting (0xc000007b) Error upon launch.
Posted: Mon Apr 20, 2026 12:36 PM

Have you done this?

Run System File Checker (SFC): Open Command Prompt as administrator and run sfc /scannow to repair corrupted Windows system files.

Have you also tried BCC7.70 and xHarbour for BCC7.70?

https://www.youtube.com/watch?v=KAvB4lKy6Jc

Regards, saludos.

João Santos - São Paulo - Brasil - Phone: +55(11)95150-7341

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