Windows 7 guest on Yosemite - Database application problems

[pjbeee]

I've been successfully running a Windows 7 x64 guest under OS-X for at least 2 years, specifically for a Visual FoxPro database corporate database app; the database and program files live on a Windows 2003 server. The main FoxPro executable is copied to the Windows 7 boot drive before the app runs. Unfortunately the latest combination of Yosemite/VirtualBox/Windows 7 is causing crashes in this FoxPro application, while the Windows guest OS and Yosemite seem otherwise stable.

I have now tried this app with both Windows 7 x86 and x64 guests, with very similar results. Needless to say, both Windows 7 x86 and x64 (native OS) machines running the FoxPro app have no issues with the app.

This was with a fresh Yosemite/VirtualBox/Windows install. I first tried the x86 version of Windows 7, but upon reading about various bugs with this combination, I installed the x64 version.

I also tried various suggested patches to Windows, disabling SMB v2 and v3, and changing some oplocks settings, with no success. I even downgraded VirtualBox to 4.3.20 with no change.

I finally downloaded a trial version of VMWare Fusion 7, base edition, imported the same Windows 7 x64 guest's running VirtualBox instance into Fusion (using the running Windows version + the VMWare Migration Agent). After a full day of use, the user has experienced no application crashes of any kind.

I am simply reporting this, and don't need a fix anytime soon. VMWare Fusion is inexpensive enough that my client will happily pay for it at this point.

My only other comment is that, aside from setting the network to a Bridged Ethernet adapter, and taking the defaults - letting the guest run as a DHCP client for its IP address - I did nothing special for the older OS X host + Windows guest installs (under which the app ran fine right away) under the previous AND Yosemite versions of OS X.

My suspicion is that something in Yosemite is not playing nice with VirtualBox, but I can't tell you where.

Several VirtualBox log files from one full day are attached.

[pjbeee]

VirtualBox log files

[Frank Mehnert]

So in other words you have a Windows 7/64 guest and this guest runs an application and since you switched the host to Yosemite, the guest application crashes from time to time, is that correct? Unfortunately there is not a single hint about any instabilities in the VBox.log files, AFAICS.