Try to do the update again or I think you can choose 'repair'.  My home pc does that occasionally, non 4D,  I try to keep a copy of cmWin32.dll on a thumbdrive for such occasions.
Maybe Nick will ring in with a more technically astute answer.
Ernie  

11.19.23
Win 11
Intel graph updated

After updating C-map 4D, Exp "crashes" every time I start Exp.
I also now can't see my updated cards.
Also see that OpenGl is not accelerated.
Any suggestions, what to do?

//Per

Hi, thanks too fast response
When I either stop C-Maps Manager in services or alternatively make the charts inaccessible (disabled in C-Map Maps Manager) Expedition works fine, Expedition works less well or not at all when I add the new charts.
Any suggestions?
Contact C-Map?
Worked decently before the update, but not perfect.
Feels like there is something that needs to be adjusted in the connection between C-Maps Manager and Expedition.
Can't find what/where though.

As info
I see that the charts are downloaded in the Exp file system.
But the charts are not presented in the "Charts" menu, C_MAP.
Now I have removed everything except Baltic Sea (from C-map maps manager). Now I know that the error is there, but I need those charts.
I will contact C-Map, there is something wrong with their setup.
Something makes Expediton not want to identify the charts.
Thanks for all the support.

Hello all,
I'm a new Expedition user, I'm seeing the same problem.

- Brand new Dell laptop.
- Downloaded and installed v11.19.23 for C-MAP 4D. 
- Downloaded WWD303 free base maps, works fine.
- Purchased and downloaded NA-D024 US West Coast, Mexico, and Hawaii.
- If I enable NA-D024 through C-Map Maps Manager, Expedition shows the spinning blue donut then quits.
- Disable NA-D024 and Expedition works fine.
- I deleted and re-downloaded NA-D024, all 27GB of it, same symptom.
- Graphics driver has been updated to the latest, C-Map shows OpenGL 4.6.0, not accelerated. I have run an OpenGL benchmark app which works.
-  I deleted and re-downloaded NA-D024 a second time... same symptom.
- I tried doing the installation "repair", no change.

After downloading NA-D024 3 times, I can't believe that it's a bad download. There's low-level network protocols (TCP/UDP) that would catch bad data, and assuming C-Maps is competent they use high level checks (file size, checksums, MD5 hash, etc) to verify that all the bits made it. So either the package from C-Maps is bad or there's a bug somewhere.

Speculation on possible causes:
1. I don't have the laptop connected to the B&G system on the boat yet, so Expedition shows "NO POSITION FIX."  
2. Map size - NA-D024 is 27GB, is it hitting a limit somewhere in Expedition?

Happy to provide logs or try any troubleshooting suggestions.