I have an VFP .dll that uses wwhttp to post/retrieve data to a ww web app. This call to the .dll happens every 10 seconds for the duration that the client app is running during the day. Users are police officers and so they leave the app running during their entire shift. On a few machines, the following error gets reported and the VFP app issues and "Out of Memory" error and quits.

Cannot load 32-bit DLL c:\windows\system32\wininet.dll

This .dll is one of several special purposed .dlls that use wwhttp and are fired from the same application using dmult.dll at different intervals. Users are connected via Verizon or Sprint aircards. We have about 900 cop cars equipped with this software, and only a handful complain about Out of Memory errors, and the above error seems to be the only thing in common.

I've checked the obvious, i.e. file does exist in the system32 and there seems to be sufficient memory on the machine ( 4 + gb ).

Any insight would be greatly appreciated.

Thanks!

You should check for memory leaks in the application. VFP will use up to 1 gig and a half of memory and then run out. So if there's a leak and it gets anywhere near that it'll crash.

Let the application run, then use Process Manager to monitor memory usage and handles. Check particularily on that memory loop.

Also if you're not doing this already I highly recommend you recreate the wwHttp object on every request rather than reusing the same instance. This helps clear some internal buffers in WinInet and ensures that the connnections are always completely closed.

+++ Rick ---