Hi,
It looks like you have disk caching enabled, disable it in control panel.

>>>Hi Al. Yes there is no switch between them and they are on a UPS. The other items I will need to check with the networks guy. Thanks. Wierd thing is that the problem seems to be getting worse. It used to happen occasionally, maybe once a month. Now it can happen even every day.
>>>
>>>I have noticed that a black exclamation icon appears in a yellow triangle in the system tray every time this happens. If you mouse over or click the icon it disappears without any tooltip or menu options.
>>
>>Jos,
>>
>>Did you Check Windows event log for additional info?
>
>Hi Sergey. Event log reports:
>
>error source=MrxSMB
>Delayed Write Failed. Windows was unable to save all the data for \Device\LanManRedirector. The data might be lost. This error may be caused by a failure in your computer hardware or network connection.
>
>However, the error detail in the subsequent popup event in the event viewer refers to another (non-VFP) file that my app is trying to write to on another disk on the server. So I am not sure if this is not actually a subsequent failure resulting from the first one or not. Also, this event does not always occur for every failure of my app.
>
>We are going to find a CAT6 cable as we were using a CAT5 cable. In the meantime we are going to run at 100mb to see if that makes a difference.
>
>Thanks.