Blue Iris won't load after Windows 11 update March 2026 - avnetsdk err 126

C

Cow_Stretcher

n3wb
Aug 10, 2025
3
0
USA
Hi,
Blue Iris was working fine on 5 cameras before a Windows 11 update recently. After the update BI launches briefly but wont load the full app and in Task Manager shows it suspends and closes. No main log file is being created.
Error from sdk_log:AVNetSDKMgr.cpp:658 — Test load avnetsdk err 126

I've already tried:
  • Reinstalled all Visual C++ runtimes using VisualCppRedist_AIO_x86_x64
  • Fresh reinstall of Blue Iris to C: drive
  • Checked Windows Defender quarantine — nothing there
  • avnetsdk.dll cannot be found anywhere on my system

BI is installed on C:, data/clips are in C:\BlueIris. Running Windows 11, 5 Dahua cameras.
Any help appreciated!
 
I did a quick search of the internet and there is some indication that avnetsdk.dll may be part of some software from Dahua, do you have some software called Patriot on your computer by any chance

I also found a reference to that file in this thread
A

Thread 'Dahua SmartPSS Crashing in Windows 10'

I am constantly getting intermittent crashes of SmartPSS in Windows 10 x64 on several PCs.
Have updated to latest windows updates and makes no difference.(was crashing prior to updates)
I have tried several laptops and desktops and seems not very reliable at all to use for constant viewing.
A bit disappointing considering i spent some money on Dahua cameras 2 x IPC-HFW1831E (latest firmware) and Dahua Nvr ->Dahua NVR4108-8P-4KS2 (latest firmware from this here)

I have SmartPSS downloaded and installed from Dahua Wiki (SmartPSS 2.02.7)

Anyone have SmartPSS running reliably without the...
Click to expand...
I did find the file on my BI 6 system in a folder "C:\Program Files (x86)\ConfigTool\ConfigTool", ConfigTools is for Dahua Camera setup!
Hope this helps!
 
Bruce_H said:
I did a quick search of the internet and there is some indication that avnetsdk.dll may be part of some software from Dahua, do you have some software called Patriot on your computer by any chance

I also found a reference to that file in this thread

I did find the file on my BI 6 system in a folder "C:\Program Files (x86)\ConfigTool\ConfigTool", ConfigTools is for Dahua Camera setup!
Hope this helps!
Click to expand...
I'm using the empiretech cameras which are just like them i think, in that post i saw it and it said they were having problems before the update but mine were fine before, so i didn't read much into it.
I used Claude AI to try and trouble shoot this and it actually told me to come here and post after trial and no success!LOL "the BI developer Ken actually responds there and this is exactly the kind of thing he can fix in one reply."

Claude explained it was also with the dahua and said "That DLL needs to come from the Dahua SDK package that Blue Iris bundles" and it has come up missing somehow.

I don't have the patriot software installed.
Also checked for configtool and I dont have that folder under C:\Program Files (x86)\ConfigTool\ConfigTool
 
Well, It is strange because the only place that the avnetsdk.dll exists on both of my BI system is in the location C:\Program Files (x86)\ConfigTool\ConfigTool, if you set up your Dahua cameras did you not use the Dahua ConfigTool. perhaps you could try installing it on your BI PC to see if it resolves the error! On both of my BI systems I have the ConfigTool installed, but in both cases BI was up and running before that software was installed, if it came bundles with BI you would think that it would exist in the BI folder structure. Another thought would be to open an admin cmd prompt and run this command "SFC /scannow" that will check all of your windows files and fix any possible windows file errors, no risk in trying it!
 
Bruce_H said:
Well, It is strange because the only place that the avnetsdk.dll exists on both of my BI system is in the location C:\Program Files (x86)\ConfigTool\ConfigTool, if you set up your Dahua cameras did you not use the Dahua ConfigTool. perhaps you could try installing it on your BI PC to see if it resolves the error! On both of my BI systems I have the ConfigTool installed, but in both cases BI was up and running before that software was installed, if it came bundles with BI you would think that it would exist in the BI folder structure. Another thought would be to open an admin cmd prompt and run this command "SFC /scannow" that will check all of your windows files and fix any possible windows file errors, no risk in trying it!
Click to expand...
I didn't need the config tool to set them up, i just went straight into the IP and configured the cams off that. Also ran SFC /scannow with no luck.
I d/led the config tool and then transferred the files below over to C:\Program Files\Blue Iris and that helped but the error just changed from 126 to 193 — that means it's now FINDING the avnetsdk.dll file but can't load it. Error 193 means "not a valid Win32 application" — in plain English, the DLL you copied is 32-bit but Blue Iris needs a 64-bit version.
  • dhnetsdk.dll
  • dhconfigsdk.dll
  • avnetsdk.dll
 
Well I would say that it's time to email support if you have a current support contract, need to use the info in "Settings", "Get Support" or your email will not get past their spam filters!
 
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